XELJANZ (tofacitinib) tablets, XELJANZ XR (tofacitinib) extended-release tablets and XELJANZ (tofacitinib) oral solution are formulated with the citrate salt of tofacitinib, a JAK inhibitor. Tofacitinib citrate is a white to off-white powder with the following chemical name: (3R,4R)-4-methyl-3-(methyl-7H-pyrrolo [2,3-d]pyrimidin-4-ylamino)-ß-oxo-1-piperidinepropanenitrile, 2-hydroxy-1,2,3-propanetricarboxylate (1:1). The solubility of tofacitinib citrate in water is 2.9 mg/mL. Tofacitinib citrate has a molecular weight of 504.5 Daltons (or 312.4 Daltons as the tofacitinib free base) and a molecular formula of C 16 H 20 N 6 O•C 6 H 8 O 7 . The chemical structure of tofacitinib citrate is: XELJANZ tablets is supplied for oral administration as a: • 5 mg white round, immediate-release film-coated tablet. Each tablet contains 5 mg of tofacitinib (equivalent to 8.08 mg of tofacitinib citrate) and the following inactive ingredients: croscarmellose sodium, HPMC 2910/Hypromellose 6cP, lactose monohydrate, macrogol/PEG3350, magnesium stearate, microcrystalline cellulose, titanium dioxide, and triacetin. • 10 mg blue round, immediate-release film-coated tablet. Each tablet contains 10 mg of tofacitinib (equivalent to 16.16 mg of tofacitinib citrate) and the following inactive ingredients: croscarmellose sodium, FD&C Blue #1/Brilliant Blue FCF Aluminum Lake, FD&C Blue #2/Indigo Carmine Aluminum Lake, HPMC 2910/Hypromellose 6cP, lactose monohydrate, macrogol/PEG3350, magnesium stearate, microcrystalline cellulose, titanium dioxide, and triacetin. XELJANZ XR is supplied for oral administration as a: • 11 mg pink, oval, extended-release film-coated tablet with a drilled hole at one end of the tablet band. Each tablet contains 11 mg of tofacitinib (equivalent to 17.77 mg tofacitinib citrate) and the following inactive ingredients: cellulose acetate, copovidone, hydroxyethyl cellulose, hydroxypropyl cellulose, HPMC 2910/Hypromellose, magnesium stearate, red iron oxide, sorbitol, titanium dioxide and triacetin. Printing ink contains, ammonium hydroxide, ferrosoferric oxide/black iron oxide, propylene glycol, and shellac glaze. • 22 mg beige, oval, extended-release film-coated tablet with a drilled hole at one end of the tablet band. Each tablet contains 22 mg of tofacitinib (equivalent to 35.54 mg tofacitinib citrate) and the following inactive ingredients: cellulose acetate, copovidone, FD&C Blue #2 Aluminum Lake, hydroxyethyl cellulose, hydroxypropyl cellulose, HPMC 2910/Hypromellose, magnesium stearate, red iron oxide, sorbitol, titanium dioxide, triacetin, and yellow iron oxide. Printing ink contains ammonium hydroxide, ferrosoferric oxide/black iron oxide, propylene glycol, and shellac glaze. XELJANZ oral solution is supplied for oral administration as a 1 mg/mL clear, colorless solution. Each 1 mL contains 1 mg of tofacitinib (equivalent to 1.62 mg of tofacitinib citrate) and the following inactive ingredients: grape flavor (natural), hydrochloric acid, lactic acid, purified water, sodium benzoate, sucralose, and xylitol. Chemical Structure

XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets) are Janus kinase (JAK) inhibitors. XELJANZ tablets and XELJANZ XR are indicated for the treatment of adult patients with: • Moderately to severely active rheumatoid arthritis (RA), who have had an inadequate response or intolerance to one or more TNF blockers. • Active psoriatic arthritis (PsA), who have had an inadequate response or intolerance to one or more TNF blockers. • Active ankylosing spondylitis (AS), who have had an inadequate response or intolerance to one or more TNF blockers. • Moderately to severely active ulcerative colitis (UC), who have had an inadequate response or intolerance to one or more TNF blockers. XELJANZ (tablets and oral solution) are indicated for the treatment of pediatric patients 2 years of age and older with: • Active PsA, who have had an inadequate response or intolerance to one or more TNF blockers. • Active polyarticular course juvenile idiopathic arthritis (pcJIA), who have had an inadequate response or intolerance to one or more TNF blockers. Limitations of Use : • Use of XELJANZ/XELJANZ XR for RA, AS, PsA, or pcJIA in combination with biologic DMARDs or potent immunosuppressants such as azathioprine and cyclosporine is not recommended. ( 1.1 , 1.2 , 1.3 , 1.4 ) • Use of XELJANZ tablets and XELJANZ XR for UC in combination with biological therapies for UC or with potent immunosuppressants such as azathioprine and cyclosporine is not recommended

Rheumatoid Arthritis XELJANZ tablets and XELJANZ XR (extended-release tablets) are indicated for the treatment of adult patients with moderately to severely active rheumatoid arthritis (RA), who have had an inadequate response or intolerance to one or more TNF blockers. Limitations of Use Use of XELJANZ tablets or XELJANZ XR in combination with biologic disease-modifying antirheumatic drugs (DMARDs) or with potent immunosuppressants such as azathioprine and cyclosporine is not recommended

Psoriatic Arthritis XELJANZ (tablets and oral solution) is indicated for the treatment of adult and pediatric patients 2 years of age and older with active psoriatic arthritis (PsA), who have had an inadequate response or intolerance to one or more TNF blockers. XELJANZ XR (extended-release tablets) is indicated for the treatment of adults with active PsA who have had an inadequate response or intolerance to one or more TNF blockers. Limitations of Use Use of XELJANZ or XELJANZ XR in combination with biologic DMARDs or with potent immunosuppressants such as azathioprine and cyclosporine is not recommended

Ankylosing Spondylitis XELJANZ tablets and XELJANZ XR (extended-release tablets) are indicated for the treatment of adult patients with active ankylosing spondylitis (AS), who have had an inadequate response or intolerance to one or more TNF blockers. Limitations of Use Use of XELJANZ tablets or XELJANZ XR in combination with biologic DMARDs or potent immunosuppressants such as azathioprine and cyclosporine is not recommended

Polyarticular Course Juvenile Idiopathic Arthritis XELJANZ (tablets and oral solution) are indicated for the treatment of pediatric patients 2 years of age and older with of active polyarticular course juvenile idiopathic arthritis (pcJIA), who have had an inadequate response or intolerance to one or more TNF blockers. Limitations of Use Use of XELJANZ in combination with biologic DMARDs or with potent immunosuppressants such as azathioprine and cyclosporine is not recommended

Ulcerative Colitis XELJANZ tablets and XELJANZ XR (extended-release tablets) are indicated for the treatment of adult patients with moderately to severely active ulcerative colitis (UC), who have an inadequate response or intolerance to one or more TNF blockers. Limitations of Use Use of XELJANZ tablets or XELJANZ XR in combination with biological therapies for UC or with potent immunosuppressants such as azathioprine and cyclosporine is not recommended.

• XELJANZ tablets: 5 mg, 10 mg • XELJANZ XR extended-release tablets: 11 mg, 22 mg • XELJANZ oral solution: 1 mg/mL XELJANZ tablets: o 5 mg of tofacitinib: White, round, immediate-release film-coated tablets, debossed with “Pfizer” on one side, and “JKI 5” on the other side. o 10 mg of tofacitinib: Blue, round, immediate-release film-coated tablets, debossed with “Pfizer” on one side, and “JKI 10” on the other side. XELJANZ XR extended-release tablets: o 11 mg of tofacitinib: Pink, oval, extended-release film-coated tablets with a drilled hole at one end of the tablet band and “JKI 11” printed on one side of the tablet. o 22 mg of tofacitinib: Beige, oval, extended-release film-coated tablets with a drilled hole at one end of the tablet band and “JKI 22” printed on one side of the tablet. XELJANZ oral solution: 1 mg/mL of tofacitinib: Clear, colorless oral solution.

Recommended Evaluations and Immunization Prior to Treatment Initiation • Prior to initiating XELJANZ/XELJANZ XR, consider performing an active and latent TB evaluation, viral hepatitis screening, a complete blood count, and updating immunizations. Avoid XELJANZ or XELJANZ XR initiation if absolute lymphocyte count <500 cells/mm 3 , an absolute neutrophil count (ANC) <1000 cells/mm 3 or hemoglobin <9 g/dL. Important Administration Instructions • XELJANZ XR (extended-release tablets) is not substitutable with XELJANZ (tablets and oral solution). ( 2.2) • Switching between XELJANZ and XELJANZ XR should be made by the healthcare provider. Recommended Dosage Adult Patients with RA, PsA or AS • XELJANZ tablets 5 mg twice daily or XELJANZ XR (extended-release tablets) 11 mg once daily. Pediatric Patients 2 Years of Age and Older with PsA or pcJIA Who Weigh At Least 10 kg • XELJANZ (tablets or oral solution) 5 mg twice daily for those ≥40 kg or weight-based equivalent twice daily for those <40 kg. Adult Patients with UC • Induction: XELJANZ tablets 10 mg twice daily or XELJANZ XR 22 mg once daily for 8 weeks; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed, continue XELJANZ tablets 10 mg twice daily or XELJANZ XR 22 mg once daily for a maximum of 16 weeks. Discontinue XELJANZ tablets 10 mg twice daily or XELJANZ XR 22 mg once daily after 16 weeks if adequate therapeutic response is not achieved. • Maintenance: XELJANZ tablets 5 mg twice daily or XELJANZ XR 11 mg once daily. For patients with loss of response during maintenance treatment, XELJANZ tablets 10 mg twice daily or XELJANZ XR 22 mg once daily may be considered and limited to the shortest duration, with careful consideration of the benefits and risks for the individual patient. Use the lowest effective dose needed to maintain response. Dosage in Patients with Renal Impairment or Hepatic Impairment • Use of XELJANZ (tablets and oral solution) or XELJANZ XR in patients with severe HI is not recommended. ( 2.3 , 2.4 , 2.5 , 8.7 ) • See full prescribing information (FPI) for recommended dosage in patients with moderate or severe RI or moderate HI. ( 2.3 , 2.4 , 2.5 , 8.6 , 8.7 ) Dosage Modification See the full prescribing information for dosage modification by indication for patients who concomitantly use CYP2C19 and/or CYP3A4 inhibitors and patients with lymphopenia, neutropenia, or anemia. ( 2.3 , 2.4 , 2.5 , 7 ) 2.1 Recommended Evaluations and Immunization Prior to Treatment Initiation Prior to initiating XELJANZ (tablets and oral solution) or XELJANZ XR (extended-release tablets), consider performing the following: • Active and latent tuberculosis (TB) infection evaluation: If the patient has latent TB, treat for TB prior to XELJANZ/XELJANZ XR treatment . • Viral hepatitis screening in accordance with clinical guidelines . • A complete blood count: Avoid initiation of XELJANZ/XELJANZ XR treatment in patients with a lymphocyte count less than 500 cells/mm 3 , absolute neutrophil count less than 1000 cells/mm 3 , or hemoglobin level less than 9 g/dL . • Baseline hepatic function evaluation: XELJANZ/XELJANZ XR is not recommended for patients with severe hepatic impairment . • Update immunizations according to current immunization guidelines. The interval between live vaccinations and initiation of XELJANZ/XELJANZ XR should be in accordance with current vaccination guidelines regarding immunosuppressive agents

Important Administration Instructions • XELJANZ XR (extended-release tablets) is not substitutable with XELJANZ (tablets and oral solution). Switching between XELJANZ and XELJANZ XR should be made by the healthcare provider. • Dose interruption is recommended for management of lymphopenia, neutropenia, and anemia . • Interrupt use of XELJANZ/XELJANZ XR if a patient develops a serious infection until the infection is controlled . • Take XELJANZ/XELJANZ XR with or without food . • Swallow XELJANZ XR whole and intact. Do not crush, split, or chew the extended-release tablets

Recommended Dosage in Adults with Rheumatoid Arthritis, Psoriatic Arthritis, and Ankylosing Spondylitis Table 1 displays the recommended dosage of XELJANZ tablets and XELJANZ XR (extended-release tablets) for adults with RA, PsA, and AS with and without renal impairment (including those who are undergoing hemodialysis) or hepatic impairment . The table also displays the recommended dosage modifications for patients concomitantly using CYP2C19 and/or CYP3A4 inhibitors , and patients with lymphopenia, neutropenia, or anemia. Table 1: Recommended Dosage of XELJANZ Tablets and XELJANZ XR in Adults with Rheumatoid Arthritis, Psoriatic Arthritis, or Ankylosing Spondylitis Adults XELJANZ Tablets XELJANZ XR (extended-release tablets) Patients with Normal Renal and Hepatic Function Excludes patients who concomitantly use XELJANZ tablets/XELJANZ XR with strong CYP3A4 inhibitor(s) or moderate CYP3A4 inhibitor(s) and strong CYP2C19 inhibitor(s), as well as patients with lymphocyte count less than 500 cells/mm 3 , ANC <1000 cells/mm 3 , or hemoglobin less than 8 g/dL or a decrease of more than 2 g/dL. 5 mg twice daily 11 mg once daily Recommended Dosage in Patients with Renal Impairment (RI) Tofacitinib PK was evaluated in subjects with varying degrees of renal impairment, where the severity of renal impairment was defined based on creatinine clearance (CLcr) estimated using the Cockcroft‑Gault equation: CLcr >80 mL/min (normal renal function); >50 and ≤80 mL/min (mild renal impairment); ≥30 and ≤50 mL/min (moderate renal impairment); <30 mL/min (severe renal impairment). Mild RI (CLcr >50 and ≤80 mL/min) 5 mg twice daily 11 mg once daily Moderate RI (CLcr ≥30 and ≤50 mL/min) 5 mg once daily XELJANZ tablets 5 mg once daily Severe RI (CLcr <30 mL/min) 5 mg once daily XELJANZ tablets 5 mg once daily For patients undergoing hemodialysis, administer the dose after the dialysis session on dialysis days. If a dose was taken before the dialysis procedure, supplemental doses are not recommended after dialysis. Recommended Dosage in Patients with Hepatic Impairment (HI) Mild HI (Child-Pugh A) 5 mg twice daily 11 mg once daily Moderate HI (Child-Pugh B) 5 mg once daily XELJANZ tablets 5 mg once daily Severe HI (Child-Pugh C) Use of XELJANZ tablets/XELJANZ XR is not recommended. Dosage Modifications with Concomitant Use of CYP3A4 and/or CYP2C19 Inhibitor(s) Strong CYP2C19 inhibitor(s) 5 mg twice daily 11 mg once daily Moderate CYP2C19 inhibitor(s) Moderate CYP3A4 inhibitor(s) Moderate CYP3A4 inhibitor(s) with strong CYP2C19 inhibitor(s) (e.g., fluconazole) 5 mg once daily XELJANZ tablets 5 mg once daily Strong CYP3A4 inhibitor(s) Dosage Modifications for Lymphopenia, Neutropenia, or Anemia Patients with lymphocyte count less than 500 cells/mm 3 , confirmed by repeat testing Discontinue dosing. Patients with ANC less than 500 cells/mm 3 Discontinue dosing. Patients with ANC 500 to 1000 cells/mm 3 Interrupt dosing. When ANC is greater than 1000, resume 5 mg twice daily. Interrupt dosing. When ANC is greater than 1000, resume 11 mg once daily. Patients with hemoglobin less than 8 g/dL or a decrease of more than 2 g/dL Interrupt dosing until hemoglobin values have normalized. Switching from XELJANZ Tablets to XELJANZ XR Extended-Release Tablets Patients treated with XELJANZ tablets 5 mg twice daily may be switched to XELJANZ XR extended-release tablets 11 mg once daily the day following the last dose of XELJANZ tablets 5 mg

Recommended Dosage in Pediatric Patients 2 Years of Age and Older with Psoriatic Arthritis or Polyarticular Course Juvenile Idiopathic Arthritis Table 2 displays the recommended body weight-based dosages for XELJANZ tablets and XELJANZ oral solution in pediatric patients 2 years of age and older with PsA or pcJIA with and without renal impairment (including those who are undergoing hemodialysis) or hepatic impairment . The table also includes recommended dosage modification for pediatric patients concomitantly using CYP2C19 and/or CYP3A4 inhibitors , and pediatric patients with lymphopenia, neutropenia, or anemia. Administer XELJANZ oral solution using the included press-in bottle adapter and oral dosing syringe . Table 2: Recommended Dosage of XELJANZ Tablets and XELJANZ Oral Solution in Pediatric Patients 2 Years of Age and Older with PsA or pcJIA Pediatric Patients 2 Years of Age and Older XELJANZ tablets and XELJANZ oral solution Patients with Normal Renal and Hepatic Function Excludes patients who concomitantly use XELJANZ (tablets and oral solution) with strong CYP3A4 inhibitor(s) or moderate CYP3A4 inhibitor(s) and strong CYP2C19 inhibitor(s), as well as patients with lymphocyte count less than 500 cells/mm 3 , ANC <1000 cells/mm 3 , or hemoglobin less than 8 g/dL or a decrease of more than 2 g/dL. • 10 kg ≤ body weight <20 kg: 3.2 mg (3.2 mL oral solution) twice daily • 20 kg ≤ body weight <40 kg: 4 mg (4 mL oral solution) twice daily • Body weight ≥40 kg: 5 mg (one 5 mg tablet or 5 mL oral solution) twice daily Patients treated with XELJANZ oral solution 5 mL may be switched to XELJANZ tablets 5 mg. Recommended Dosage in Patients with Renal Impairment (RI) Mild RI Same as patients with normal renal function. Moderate RI • 10 kg ≤ body weight <20 kg: 3.2 mg once daily • 20 kg ≤ body weight <40 kg: 4 mg once daily • Body weight ≥40 kg: 5 mg once daily Severe RI • 10 kg ≤ body weight <20 kg: 3.2 mg once daily • 20 kg ≤ body weight <40 kg: 4 mg once daily • Body weight ≥40 kg: 5 mg once daily For patients undergoing hemodialysis, administer the dose after the dialysis session on dialysis days. If a dose was taken before the dialysis procedure, supplemental doses are not recommended after dialysis. Recommended Dosage in Patients with Hepatic Impairment (HI) Mild HI Same as patients with normal hepatic function. Moderate HI • 10 kg ≤ body weight <20 kg: 3.2 mg once daily • 20 kg ≤ body weight <40 kg: 4 mg once daily • Body weight ≥40 kg: 5 mg once daily Severe HI Use of XELJANZ tablets/XELJANZ oral solution is not recommended. Dosage Modifications with Concomitant Use of CYP3A4 and/or CYP2C19 Inhibitor(s) Strong CYP2C19 inhibitor(s) No dosage modification is recommended. Moderate CYP2C19 inhibitor(s) Moderate CYP3A4 inhibitor(s) Moderate CYP3A4 inhibitor(s) with strong CYP2C19 inhibitor(s) (e.g., fluconazole) • 10 kg ≤ body weight <20 kg: 3.2 mg once daily • 20 kg ≤ body weight <40 kg: 4 mg once daily • Body weight ≥40 kg: 5 mg once daily Strong CYP3A4 inhibitor(s) Dosage Modifications for Lymphopenia, Neutropenia, or Anemia Patients with lymphocyte count less than 500 cells/mm 3 , confirmed by repeat testing Discontinue dosing. Patients with ANC less than 500 cells/mm 3 Discontinue dosing. Patients with ANC 500 to 1000 cells/mm 3 Interrupt dosing until ANC is greater than 1000 cells/mm 3 . Patients with hemoglobin less than 8 g/dL or a decrease of more than 2 g/dL Interrupt dosing until hemoglobin values have normalized

Recommended Dosage in Adults with Ulcerative Colitis Table 3 displays the recommended dosage of XELJANZ tablets and XELJANZ XR (extended-release tablets) in adult patients with ulcerative colitis (UC) with and without renal impairment (including those who are undergoing hemodialysis) or hepatic impairment . Table 4 displays the recommended dosage modification for patients concomitantly using CYP2C19 and/or CYP3A4 inhibitors , and patients with lymphopenia, neutropenia, or anemia. Table 3: Recommended Dosage of XELJANZ Tablets and XELJANZ XR in Adults with Ulcerative Colitis With and Without Renal Impairment or Hepatic Impairment Adults XELJANZ tablets XELJANZ XR (extended-release tablets) Patients with Normal Renal and Hepatic Function Excludes patients who concomitantly use XELJANZ tablets/XELJANZ XR with strong CYP3A4 inhibitor(s) or moderate CYP3A4 inhibitor(s) and strong CYP2C19 inhibitor(s), as well as patients with lymphocyte count less than 500 cells/mm 3 , ANC <1000 cells/mm 3 , or hemoglobin less than 8 g/dL or a decrease of more than 2 g/dL. Induction: 10 mg twice daily for at least 8 weeks ; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed continue 10 mg twice daily for a maximum of 16 weeks. Discontinue 10 mg twice daily after 16 weeks if adequate therapeutic response is not achieved. Induction: 22 mg once daily for at least 8 weeks; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed continue 22 mg once daily for a maximum of 16 weeks. Discontinue 22 mg once daily after 16 weeks if adequate therapeutic response is not achieved. Maintenance: 5 mg twice daily. For patients with loss of response during maintenance treatment, may consider a dosage of 10 mg twice daily (limited to the shortest duration), with careful consideration of the benefits and risks for the individual patient. Use the lowest effective dosage needed to maintain response. Maintenance: 11 mg once daily. For patients with loss of response during maintenance treatment, may consider a dosage of 22 mg once daily (limited to the shortest duration), with careful consideration of the benefits and risks for the individual patient. Use the lowest effective dose needed to maintain response. Recommended Dosage in Patients with Renal Impairment (RI) Tofacitinib PK was evaluated in subjects with varying degrees of renal impairment, where the severity of renal impairment was defined based on creatinine clearance (CLcr) estimated using the Cockcroft‑Gault equation: CLcr >80 mL/min (normal renal function); CLcr >50 and ≤80 mL/min (mild renal impairment); ≥30 and ≤50 mL/min (moderate renal impairment); <30 mL/min (severe renal impairment). Mild RI (CLcr >50 and ≤80 mL/min) Same as patients with normal renal function. Moderate RI (CLcr ≥30 and ≤50 mL/min) Induction: 5 mg twice daily for at least 8 weeks ; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed continue 5 mg twice daily for a maximum of 16 weeks. Discontinue 5 mg twice daily after 16 weeks if adequate therapeutic response is not achieved. Induction: 11 mg once daily for at least 8 weeks; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed continue 11 mg once daily for a maximum of 16 weeks. Discontinue 11 mg once daily after 16 weeks if adequate therapeutic response is not achieved. Severe RI (CLcr <30 mL/min) Maintenance: 5 mg once daily. For patients with loss of response during maintenance treatment, may consider a dosage of 5 mg twice daily (limited to the shortest duration), with careful consideration of the benefits and risks for the individual patient. Use the lowest effective dosage needed to maintain response. For patients undergoing hemodialysis, administer the dose after the dialysis session on dialysis days. If a dose was taken before the dialysis procedure, supplemental doses are not recommended after dialysis. Maintenance: XELJANZ XR is not recommended. See Maintenance Dosage for XELJANZ tablets for Moderate or Severe RI. For patients undergoing hemodialysis, administer the dose after the dialysis session on dialysis days. If a dose was taken before the dialysis procedure, supplemental doses are not recommended after dialysis. Recommended Dosage in Patients with Hepatic Impairment (HI) Mild HI (Child-Pugh A) Same as patients with normal hepatic function. Moderate HI (Child-Pugh B) Induction: 5 mg twice daily for at least 8 weeks ; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed continue 5 mg twice daily for a maximum of 16 weeks. Discontinue 5 mg twice daily after 16 weeks if adequate therapeutic response is not achieved. Induction: 11 mg once daily for at least 8 weeks; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed continue 11 mg once daily for a maximum of 16 weeks. Discontinue 11 mg once daily after 16 weeks if adequate therapeutic response is not achieved. Maintenance: 5 mg once daily. For patients with loss of response during maintenance treatment, may consider a dosage of 5 mg twice daily (limited to the shortest duration), with careful consideration of the benefits and risks for the individual patient. Use the lowest effective dosage needed to maintain response. Maintenance: XELJANZ XR is not recommended. See Maintenance Dosage for XELJANZ tablets for Moderate HI. Severe HI (Child-Pugh C) Use of XELJANZ tablets/XELJANZ XR is not recommended. Table 4: Dosage Modifications of XELJANZ Tablets and XELJANZ XR Due to Drug Interactions and for Lymphopenia, Neutropenia or Anemia in Adults with Ulcerative Colitis Adults XELJANZ Tablets XELJANZ XR (extended-release tablets) Dosage Modifications with Concomitant Use of CYP3A4 and/or CYP2C19 Inhibitor(s) Strong CYP2C19 inhibitor(s) No dosage modification is recommended. Moderate CYP2C19 inhibitor(s) Moderate CYP3A4 inhibitor(s) Moderate CYP3A4 inhibitor(s) with strong CYP2C19 inhibitor(s) (e.g., fluconazole) Induction: 5 mg twice daily for at least 8 weeks ; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed continue 5 mg twice daily for a maximum of 16 weeks. Discontinue 5 mg twice daily after 16 weeks if adequate therapeutic response is not achieved. Induction: 11 mg once daily for at least 8 weeks; evaluate patients and transition to maintenance therapy depending on therapeutic response. If needed continue 11 mg once daily for a maximum of 16 weeks. Discontinue 11 mg once daily after 16 weeks if adequate therapeutic response is not achieved. Strong CYP3A4 inhibitor(s) Maintenance: 5 mg once daily. For patients with loss of response during maintenance treatment, may consider a dosage of 5 mg twice daily (limited to the shortest duration), with careful consideration of the benefits and risks for the individual patient. Use the lowest effective dosage needed to maintain response. Maintenance: XELJANZ XR is not recommended. see Maintenance Dosage for XELJANZ tablets for Strong CYP3A4 inhibitors. Dosage Modifications for Lymphopenia, Neutropenia, or Anemia Lymphocyte count less than 500 cells/mm 3 , confirmed by repeat testing Discontinue dosing. ANC less than 500 cells/mm 3 Discontinue dosing. ANC 500 to 1000 cells/mm 3 If taking: • 10 mg twice daily, reduce to 5 mg twice daily. When ANC is greater than 1000, increase to 10 mg twice daily based on clinical response. • 5 mg twice daily, interrupt dosing. When ANC is greater than 1000, resume 5 mg twice daily. If taking: • 22 mg once daily, reduce to 11 mg once daily. When ANC is greater than 1000, increase to 22 mg once daily based on clinical response. • 11 mg once daily, interrupt dosing. When ANC is greater than 1000, resume 11 mg once daily. Hemoglobin less than 8 g/dL or a decrease of more than 2 g/dL Interrupt dosing until hemoglobin values have normalized. Switching from XELJANZ Tablets to XELJANZ XR Extended-Release Tablets Patients treated with XELJANZ tablets: • 5 mg twice daily may be switched to XELJANZ XR extended-release tablets 11 mg once daily the day following the last dose of XELJANZ tablets 5 mg. • 10 mg twice daily may be switched to XELJANZ XR extended-release tablets 22 mg once daily the day following the last dose of XELJANZ tablets 10 mg.

• Serious Infections : Avoid use of XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets) during an active serious infection, including localized infections. • Gastrointestinal Perforations : Promptly evaluate patients at increased risk for gastrointestinal perforation who present with new onset abdominal symptoms. • Laboratory Monitoring : Recommended due to potential changes in lymphocytes, neutrophils, hemoglobin, liver enzymes and lipids. • Vaccinations : Avoid use of live vaccines concurrently with XELJANZ or XELJANZ XR. 5.1 Serious Infections Serious and sometimes fatal infections may occur with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets). Serious and sometimes fatal infections due to bacterial, mycobacterial, invasive fungal, viral, or other opportunistic pathogens have been reported in patients receiving XELJANZ. The most common serious infections reported with XELJANZ included pneumonia, urinary tract infection, cellulitis, herpes zoster, bronchitis, septic shock, diverticulitis, gastroenteritis, appendicitis, and sepsis . Among opportunistic infections, tuberculosis and other mycobacterial infections, cryptococcosis, histoplasmosis, esophageal candidiasis, pneumocystosis, multi-dermatomal herpes zoster, cytomegalovirus infections, BK virus infection, and listeriosis were reported with XELJANZ. Some patients have presented with disseminated rather than localized disease, and were often taking concomitant immunomodulating agents such as methotrexate or corticosteroids. In the UC population, treatment with XELJANZ tablets 10 mg twice daily was associated with greater risk of serious infections compared to 5 mg twice daily. Additionally, opportunistic herpes zoster infections (including meningoencephalitis, ophthalmologic, and disseminated cutaneous) were seen in patients who were treated with XELJANZ tablets 10 mg twice daily. Other serious infections that were not reported in clinical studies may also occur (e.g., coccidioidomycosis). Avoid use of XELJANZ/XELJANZ XR in patients with an active, serious infection, including localized infections. The risks and benefits of treatment should be considered prior to initiating XELJANZ/XELJANZ XR in patients: • with chronic or recurrent infection • who have been exposed to tuberculosis • with a history of a serious or an opportunistic infection • who have resided or traveled in areas of endemic tuberculosis or endemic mycoses; or • with underlying conditions that may predispose them to infection. Closely monitor patients for the development of signs and symptoms of infection during and after treatment with XELJANZ/XELJANZ XR. Interrupt XELJANZ/XELJANZ XR if a patient develops a serious infection, an opportunistic infection, or sepsis. In patients who develop a new infection during treatment with XELJANZ/XELJANZ XR, promptly complete diagnostic testing appropriate for an immunocompromised patient; initiate appropriate antimicrobial therapy, and monitor the patients closely. Caution is also recommended in patients with a history of chronic lung disease, or in those who develop interstitial lung disease, as they may be more prone to infections. Risk of infection may be higher with increasing degrees of lymphopenia and consideration should be given to lymphocyte counts when assessing individual patient risk of infection. Discontinuation and monitoring criteria for lymphopenia are recommended . Tuberculosis Evaluate and test patients for latent or active tuberculosis (TB) infection prior to and per applicable guidelines during administration of XELJANZ/XELJANZ XR. Consider anti-TB therapy prior to administration of XELJANZ/XELJANZ XR in patients with a past history of latent or active TB in whom an adequate course of treatment cannot be confirmed, and for patients with a negative test for latent TB but who have risk factors for TB infection. Consultation with a physician with expertise in the treatment of TB is recommended to aid in the decision about whether initiating anti-TB therapy is appropriate for an individual patient. Monitor patients closely for the development of signs and symptoms of TB, including patients who tested negative for latent TB infection prior to initiating therapy. Treat patients with latent TB with standard antimycobacterial therapy before administering XELJANZ/XELJANZ XR. Viral Reactivation Viral reactivation, including cases of herpes virus reactivation (e.g., herpes zoster), were observed in clinical studies with XELJANZ. Postmarketing cases of hepatitis B reactivation have been reported in patients treated with XELJANZ. The impact of XELJANZ/XELJANZ XR on chronic viral hepatitis reactivation is unknown. Patients who screened positive for hepatitis B or C were excluded from clinical trials. Perform screening for viral hepatitis in accordance with clinical guidelines before starting therapy with XELJANZ/XELJANZ XR. The risk of herpes zoster is increased in patients treated with XELJANZ/XELJANZ XR and appears to be higher in patients treated with XELJANZ in Japan and Korea

Increased Risk of Mortality Increased risk of mortality may occur with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets). Adult patients with rheumatoid arthritis (RA), 50 years of age and older, with at least one cardiovascular risk factor treated with XELJANZ tablets 5 mg or 10 mg twice a day had a higher observed rate of all-cause mortality, including sudden cardiovascular death, compared to those treated with TNF blockers in a large, randomized, postmarketing safety study (RA Safety Study 1). The incidence rate of all-cause mortality per 100 patient-years was 1.23 for XELJANZ tablets 10 mg twice a day, 0.88 for XELJANZ tablets 5 mg twice a day, and 0.69 for TNF blockers . Consider the benefits and risks for the individual patient prior to initiating or continuing therapy with XELJANZ/XELJANZ XR. XELJANZ 10 mg twice daily (or XELJANZ XR 22 mg once daily) dosages are not recommended for the treatment of RA, PsA, AS, or pcJIA . For the treatment of UC, use XELJANZ/XELJANZ XR at the lowest effective dose and for the shortest duration needed to achieve/maintain therapeutic response

Malignancy and Lymphoproliferative Disorders Malignancies and lymphoproliferative disorders may occur with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets). Malignancies, including lymphomas and solid cancers, were observed in clinical studies of XELJANZ . Other malignancies were observed in XELJANZ clinical studies and the postmarketing setting, including, but not limited to, lung cancer, breast cancer, melanoma, prostate cancer, and pancreatic cancer. In RA Safety Study 1, a higher rate of malignancies (excluding non-melanoma skin cancer (NMSC)) was observed in patients treated with XELJANZ tablets 5 mg or 10 mg twice a day compared with TNF blockers. The incidence rate of malignancies (excluding NMSC) per 100 patient-years was 1.13 for XELJANZ tablets 10 mg twice a day, 1.13 for XELJANZ tablets 5 mg twice a day, and 0.77 for TNF blockers. Patients who are current or past smokers are at additional increased risk . Lymphomas and lung cancers, which are a subset of all malignancies in RA Safety Study 1, were observed at a higher rate in patients treated with XELJANZ tablets 5 mg twice a day and XELJANZ tablets 10 mg twice a day compared to those treated with TNF blockers. The incidence rate of lymphomas per 100 patient-years was 0.11 for XELJANZ tablets 10 mg twice a day, 0.07 for XELJANZ tablets 5 mg twice a day, and 0.02 for TNF blockers. The incidence rate of lung cancers per 100 patient-years among current and past smokers was 0.59 for XELJANZ tablets 10 mg twice a day, 0.48 for XELJANZ tablets 5 mg twice a day, and 0.27 for TNF blockers . Consider the benefits and risks for the individual patient prior to initiating or continuing therapy with XELJANZ/XELJANZ XR, particularly in patients with a known malignancy (other than a successfully treated NMSC), patients who develop a malignancy while on treatment, and patients who are current or past smokers. XELJANZ 10 mg twice daily (or XELJANZ XR 22 mg once daily) dosages are not recommended for the treatment of RA, PsA, AS, or pcJIA . Non-Melanoma Skin Cancer Non-melanoma skin cancers (NMSCs) have been reported in patients treated with XELJANZ tablets. Periodic skin examination is recommended for patients who are at increased risk for skin cancer. In the UC population, treatment with XELJANZ tablets 10 mg twice daily was associated with greater risk of NMSC than treatment with placebo

Major Adverse Cardiovascular Events Major adverse cardiovascular events may occur with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets). In RA Safety Study 1, patients with RA who were 50 years of age and older with at least one cardiovascular risk factor and treated with XELJANZ tablets 5 mg or 10 mg twice daily had a higher rate of major adverse cardiovascular events (MACE) defined as cardiovascular death, non-fatal myocardial infarction (MI), and non-fatal stroke, compared to those treated with TNF blockers. The incidence rate of MACE per 100 patient-years was 1.11 for XELJANZ tablets 10 mg twice a day, 0.91 for XELJANZ tablets 5 mg twice a day, and 0.79 for TNF blockers. The incidence rate of fatal or non-fatal myocardial infarction per 100 patient-years was 0.39 for XELJANZ tablets 10 mg twice a day, 0.36 for XELJANZ tablets 5 mg twice a day, and 0.2 for TNF blockers . Patients who are current or past smokers are at additional increased risk. Consider the benefits and risks for the individual patient prior to initiating or continuing therapy with XELJANZ/XELJANZ XR, particularly in patients who are current or past smokers and patients with other cardiovascular risk factors. Inform patients about the symptoms of serious cardiovascular events and the steps to take if they occur. Discontinue XELJANZ/XELJANZ XR in patients that have experienced a MI or stroke. XELJANZ 10 mg twice daily (or XELJANZ XR 22 mg once daily) dosages are not recommended for the treatment of RA, PsA, AS, or pcJIA

Thrombosis Thrombosis may occur with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets). Thrombosis, including pulmonary embolism (PE), deep venous thrombosis (DVT), and arterial thrombosis, have occurred in patients treated with XELJANZ and other Janus kinase ( JAK) inhibitors used to treat inflammatory conditions. Many of these events were serious and some resulted in death . Patients with RA 50 years of age and older with at least one cardiovascular risk factor treated with XELJANZ tablets 5 mg or 10 mg twice daily compared to TNF blockers in RA Safety Study 1 had an observed increase in incidence of these thrombotic events. The incidence rate of DVT per 100 patient-years was 0.28 for XELJANZ tablets 10 mg twice a day, 0.22 for XELJANZ tablets 5 mg twice a day, and 0.16 for TNF blockers. The incidence rate of PE per 100 patient-years was 0.49 for XELJANZ tablets 10 mg twice a day, 0.18 for XELJANZ tablets 5 mg twice a day, and 0.05 for TNF blockers . XELJANZ 10 mg twice daily (or XELJANZ XR 22 mg once daily) dosages are not recommended for the treatment of RA, PsA, AS, or pcJIA . In a long-term extension study in patients with UC, five cases of pulmonary embolism were reported in patients taking XELJANZ 10 mg twice daily, including one death in a patient with advanced cancer. Promptly evaluate patients with symptoms of thrombosis and discontinue XELJANZ/XELJANZ XR in patients with symptoms of thrombosis. Avoid XELJANZ/XELJANZ XR in patients that may be at increased risk of thrombosis. For the treatment of UC, use XELJANZ tablets or XELJANZ XR at the lowest effective dose and for the shortest duration needed to achieve/maintain therapeutic response

Gastrointestinal Perforations Gastrointestinal perforations may occur with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets). Events of gastrointestinal perforation have been reported in clinical studies with XELJANZ tablets, although the role of JAK inhibition in these events is not known. In these studies, many patients with RA received background therapy with nonsteroidal anti-inflammatory drugs (NSAIDs). There was no discernable difference in frequency of gastrointestinal perforation between the placebo and the XELJANZ tablets treatment groups in clinical trials of patients with UC, and many of them were receiving background corticosteroids. Promptly evaluate patients treated with XELJANZ/XELJANZ XR who may be at increased risk for gastrointestinal perforation (e.g., patients with a history of diverticulitis or taking NSAIDs) and who present with new onset abdominal symptoms for early identification of gastrointestinal perforation

Hypersensitivity Reactions Hypersensitivity reactions may occur with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets). Reactions such as angioedema and urticaria that may reflect drug hypersensitivity have been observed in patients receiving XELJANZ/XELJANZ XR. Some events were serious. If a serious hypersensitivity reaction occurs, promptly discontinue XELJANZ/XELJANZ XR while evaluating the potential cause or causes of the reaction

Laboratory Abnormalities Laboratory abnormalities may occur with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets). Lymphocyte Abnormalities Treatment with XELJANZ tablets was associated with initial lymphocytosis at one month of XELJANZ tablets treatment followed by a gradual decrease in mean absolute lymphocyte counts below the baseline of approximately 10% during 12 months of therapy. Lymphocyte counts less than 500 cells/mm 3 in these patients were associated with an increased incidence of treated and serious infections. • Monitor lymphocyte counts at baseline and every 3 months thereafter. • Avoid initiation of XELJANZ/XELJANZ XR treatment in patients with a low lymphocyte count (i.e., less than 500 cells/mm 3 ). In patients who develop a confirmed absolute lymphocyte count less than 500 cells/mm 3 , treatment with XELJANZ/XELJANZ XR is not recommended. Neutropenia Treatment with XELJANZ tablets was associated with an increased incidence of neutropenia (less than 2000 cells/mm 3 ) compared to treatment with placebo. • Monitor neutrophil counts at baseline and after 4-8 weeks of treatment and every 3 months thereafter. • Avoid initiation of XELJANZ/XELJANZ XR treatment in patients with a low neutrophil count (i.e., ANC less than 1000 cells/mm 3 ). For patients who develop a persistent ANC of 500 to 1000 cells/mm 3 , interrupt dosing until ANC is greater than or equal to 1000 cells/mm 3 . In patients who develop an ANC less than 500 cells/mm 3 , treatment with XELJANZ/XELJANZ XR is not recommended. Anemia • Monitor hemoglobin at baseline and after 4-8 weeks of treatment and every 3 months thereafter. • Avoid initiation of XELJANZ/XELJANZ XR treatment in patients with a low hemoglobin level (i.e., less than 9 g/dL). Interrupt treatment with XELJANZ/XELJANZ XR in patients who develop hemoglobin levels less than 8 g/dL or whose hemoglobin level drops greater than 2 g/dL on treatment until hemoglobin values have normalized. Liver Enzyme Elevations Treatment with XELJANZ tablets was associated with an increased incidence of liver enzyme elevation compared to treatment with placebo. Most of these abnormalities occurred in studies with background DMARD therapy (primarily methotrexate). • Routine monitoring of liver tests and prompt investigation of the causes of liver enzyme elevations is recommended to identify potential cases of drug-induced liver injury. • If drug-induced liver injury is suspected, interrupt the administration of XELJANZ/XELJANZ XR until this diagnosis has been excluded. Lipid Elevations Treatment with XELJANZ tablets was associated with dose-dependent increases in lipid parameters including total cholesterol, low-density lipoprotein (LDL) cholesterol, and high-density lipoprotein (HDL) cholesterol. Maximum changes in these lipid parameters were generally observed within 6 weeks. There were no clinically relevant changes in LDL/HDL cholesterol ratios. The effect of these lipid parameter elevations on cardiovascular morbidity and mortality has not been determined. • Perform assessment of lipid parameters approximately 4-8 weeks following initiation of XELJANZ/XELJANZ XR therapy. • Manage patients according to clinical guidelines [e.g., National Cholesterol Educational Program (NCEP)] for the management of hyperlipidemia

Vaccinations Avoid use of live vaccines concurrently with XELJANZ (tablets and oral solution) or XELJANZ XR (extended-release tablets). Prior to initiating XELJANZ/XELJANZ XR therapy, update immunizations in agreement with current immunization guidelines. The interval between live vaccinations and initiation of XELJANZ/XELJANZ XR therapy should be in accordance with current vaccination guidelines regarding immunosuppressive agents

Risk of Gastrointestinal Obstruction with XELJANZ XR - A Non-Deformable Extended-Release Formulation Gastrointestinal obstruction may occur with XELJANZ XR (extended-release tablets). Avoid use of XELJANZ XR in patients with pre-existing severe gastrointestinal narrowing (pathologic or iatrogenic). There have been rare reports of obstructive symptoms in patients with known strictures in association with the ingestion of other drugs utilizing a non-deformable extended-release formulation.

Table 7 includes drugs with clinically significant drug interactions when concomitantly used with XELJANZ (tablets and oral solution) and XELJANZ XR (extended-release tablets) and instructions for preventing or managing them. Table 7: Clinically Significant Interactions Affecting XELJANZ/XELJANZ XR When Concomitantly Used with Other Drugs Strong CYP3A4 Inhibitors (e.g., ketoconazole) Clinical Impact Increased exposure to tofacitinib Intervention Dosage modification of XELJANZ/XELJANZ XR is recommended Moderate CYP3A4 Inhibitors Concomitantly Used with Strong CYP2C19 Inhibitors (e.g., fluconazole) Clinical Impact Increased exposure to tofacitinib Intervention Dosage modification of XELJANZ/XELJANZ XR is recommended Strong CYP3A4 Inducers (e.g., rifampin) Clinical Impact Decreased exposure to tofacitinib and may result in loss of or reduced clinical response Intervention Concomitant use with XELJANZ/XELJANZ XR is not recommended Immunosuppressive Drugs (e.g., azathioprine, tacrolimus, cyclosporine) Clinical Impact Risk of added immunosuppression; concomitant use of XELJANZ/XELJANZ XR with biologic DMARDs or potent immunosuppressants has not been studied in patients with RA, PsA, AS, UC, or pcJIA. Intervention Concomitant use with XELJANZ/XELJANZ XR is not recommended See FPI for clinically significant drug interactions. ( 2 , 7 )