CIPRO (ciprofloxacin hydrochloride) Tablets and CIPRO (ciprofloxacin) Oral Suspension are synthetic antimicrobial agents for oral administration. Ciprofloxacin hydrochloride, USP, a fluoroquinolone, is the monohydrochloride monohydrate salt of 1-cyclopropyl-6-fluoro-1, 4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid. It is a faintly yellowish to light yellow crystalline substance with a molecular weight of 385.8. Its empirical formula is C 17 H 18 FN 3 O 3 •HCl•H 2 O and its chemical structure is as follows: Ciprofloxacin is 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid. Its empirical formula is C 17 H 18 FN 3 O 3 and its molecular weight is 331.4. It is a faintly yellowish to light yellow crystalline substance and its chemical structure is as follows: CIPRO film-coated tablets are available in 250 mg and 500 mg (ciprofloxacin equivalent) strengths. Each CIPRO film-coated tablet contains 250 mg (equivalent to 291 mg ciprofloxacin hydrochloride monohydrate) or 500 mg of ciprofloxacin (equivalent to 582 mg ciprofloxacin hydrochloride monohydrate) CIPRO tablets are white to slightly yellowish. The inactive ingredients are cornstarch, crospovidone, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, silicon dioxide, and titanium dioxide. CIPRO Oral Suspension is available in 5% (5 g ciprofloxacin in 100 mL) and 10% (10 g ciprofloxacin in 100 mL) strengths. CIPRO Oral Suspension is a white to slightly yellowish suspension with strawberry flavor which may contain yellow-orange droplets. It is composed of ciprofloxacin microcapsules and diluent which are mixed prior to dispensing . The components of the suspension have the following compositions: • Microcapsules–ciprofloxacin, hypromellose, magnesium stearate, methacrylic acid copolymer, Polysorbate 20 and povidone. • Diluent–medium-chain triglycerides, sucrose, soy-lecithin, water, and strawberry flavor. • Five mL of 5% suspension contains approximately 1.4 g of sucrose and 5 mL of 10% suspension contains approximately 1.3 g of sucrose. chem struc 1 chem struc 2

CIPRO is a fluoroquinolone antibacterial indicated in adults (18 years of age and older) with the following infections caused by designated, susceptible bacteria and in pediatric patients where indicated: • Skin and Skin Structure Infections • Bone and Joint Infections • Complicated Intra-Abdominal Infections • Infectious Diarrhea • Typhoid Fever (Enteric Fever) • Uncomplicated Cervical and Urethral Gonorrhea • Inhalational Anthrax post-exposure in adult and pediatric patients ( 1.7) • Plague in adult and pediatric patients • Chronic Bacterial Prostatitis • Lower Respiratory Tract Infections • Acute Exacerbation of Chronic Bronchitis • Urinary Tract Infections • Urinary Tract Infections (UTI) • Acute Uncomplicated Cystitis • Complicated UTI and Pyelonephritis in Pediatric Patients • Acute Sinusitis Usage To reduce the development of drug-resistant bacteria and maintain the effectiveness of CIPRO and other antibacterial drugs, CIPRO should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria

Skin and Skin Structure Infections CIPRO is indicated in adult patients for treatment of skin and skin structure infections caused by Escherichia coli, Klebsiella pneumoniae, Enterobacter cloacae, Proteus mirabilis, Proteus vulgaris, Providencia stuartii, Morganella morganii, Citrobacter freundii, Pseudomonas aeruginosa, methicillin-susceptible Staphylococcus aureus, methicillin-susceptible Staphylococcus epidermidis, or Streptococcus pyogenes

Bone and Joint Infections CIPRO is indicated in adult patients for treatment of bone and joint infections caused by Enterobacter cloacae, Serratia marcescens, or Pseudomonas aeruginosa

Complicated Intra-Abdominal Infections CIPRO is indicated in adult patients for treatment of complicated intra-abdominal infections (used in combination with metronidazole) caused by Escherichia coli, Pseudomonas aeruginosa, Proteus mirabilis, Klebsiella pneumoniae, or Bacteroides fragilis

Infectious Diarrhea CIPRO is indicated in adult patients for treatment of infectious diarrhea caused by Escherichia coli (enterotoxigenic isolates), Campylobacter jejuni, Shigella boydii † , Shigella dysenteriae, Shigella flexneri or Shigella sonnei † when antibacterial therapy is indicated. † Although treatment of infections due to this organism in this organ system demonstrated a clinically significant outcome, efficacy was studied in fewer than 10 patients

Typhoid Fever (Enteric Fever) CIPRO is indicated in adult patients for treatment of typhoid fever (enteric fever ) caused by Salmonella typhi. The efficacy of ciprofloxacin in the eradication of the chronic typhoid carrier state has not been demonstrated

Uncomplicated Cervical and Urethral Gonorrhea CIPRO is indicated in adult patients for treatment of uncomplicated cervical and urethral gonorrhea due to Neisseria gonorrhoeae

Inhalational Anthrax (Post-Exposure) CIPRO is indicated in adults and pediatric patients from birth to 17 years of age for inhalational anthrax (post-exposure) to reduce the incidence or progression of disease following exposure to aerosolized Bacillus anthracis. Ciprofloxacin serum concentrations achieved in humans served as a surrogate endpoint reasonably likely to predict clinical benefit and provided the initial basis for approval of this indication. 1 Supportive clinical information for ciprofloxacin for anthrax post-exposure prophylaxis was obtained during the anthrax bioterror attacks of October 2001

Plague CIPRO is indicated for treatment of plague, including pneumonic and septicemic plague, due to Yersinia pestis (Y. pestis) and prophylaxis for plague in adults and pediatric patients from birth to 17 years of age. Efficacy studies of ciprofloxacin could not be conducted in humans with plague for feasibility reasons. Therefore this indication is based on an efficacy study conducted in animals only

Chronic Bacterial Prostatitis CIPRO is indicated in adult patients for treatment of chronic bacterial prostatitis caused by Escherichia coli or Proteus mirabilis

Lower Respiratory Tract Infections CIPRO is indicated in adult patients for treatment of lower respiratory tract infections caused by Escherichia coli, Klebsiella pneumoniae, Enterobacter cloacae, Proteus mirabilis, Pseudomonas aeruginosa, Haemophilus influenzae, Haemophilus parainfluenzae, or Streptococcus pneumoniae. CIPRO is not a drug of first choice in the treatment of presumed or confirmed pneumonia secondary to Streptococcus pneumoniae. CIPRO is indicated for the treatment of acute exacerbations of chronic bronchitis (AECB) caused by Moraxella catarrhalis. Because fluoroquinolones, including CIPRO, have been associated with serious adverse reactions and for some patients AECB is self-limiting, reserve CIPRO for treatment of AECB in patients who have no alternative treatment options

Urinary Tract Infections Urinary Tract Infections in Adults CIPRO is indicated in adult patients for treatment of urinary tract infections caused by Escherichia coli , Klebsiella pneumoniae , Enterobacter cloacae , Serratia marcescens , Proteus mirabilis , Providencia rettgeri , Morganella morganii , Citrobacter koseri , Citrobacter freundii , Pseudomonas aeruginosa , methicillin-susceptible Staphylococcus epidermidis , Staphylococcus saprophyticus , or Enterococcus faecalis . Acute Uncomplicated Cystitis CIPRO is indicated in adult female patients for treatment of acute uncomplicated cystitis caused by Escherichia coli or Staphylococcus saprophyticus. Because fluoroquinolones, including CIPRO, have been associated with serious adverse reactions and for some patients acute uncomplicated cystitis is self-limiting, reserve CIPRO for treatment of acute uncomplicated cystitis in patients who have no alternative treatment options. Complicated Urinary Tract Infection and Pyelonephritis in Pediatric Patients CIPRO is indicated in pediatric patients aged one to 17 years of age for treatment of complicated urinary tract infections (cUTI) and pyelonephritis due to Escherichia coli . Although effective in clinical trials, CIPRO is not a drug of first choice in the pediatric population due to an increased incidence of adverse reactions compared to controls, including reactions related to joints and/or surrounding tissues . CIPRO, like other fluoroquinolones, is associated with arthropathy and histopathological changes in weight-bearing joints of juvenile animals

Acute Sinusitis CIPRO is indicated in adult patients for treatment of acute sinusitis caused by Haemophilus influenzae, Streptococcus pneumoniae, or Moraxella catarrhalis. Because fluoroquinolones, including CIPRO, have been associated with serious adverse reactions and for some patients acute sinusitis is self-limiting, reserve CIPRO for treatment of acute sinusitis in patients who have no alternative treatment options

Usage To reduce the development of drug-resistant bacteria and maintain the effectiveness of CIPRO and other antibacterial drugs, CIPRO should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy. If anaerobic organisms are suspected of contributing to the infection, appropriate therapy should be administered. Appropriate culture and susceptibility tests should be performed before treatment in order to isolate and identify organisms causing infection and to determine their susceptibility to ciprofloxacin. Therapy with CIPRO may be initiated before results of these tests are known; once results become available appropriate therapy should be continued. As with other drugs, some isolates of Pseudomonas aeruginosa may develop resistance fairly rapidly during treatment with ciprofloxacin. Culture and susceptibility testing performed periodically during therapy will provide information not only on the therapeutic effect of the antimicrobial agent but also on the possible emergence of bacterial resistance.

• Tablets: 250 mg, functionally scored and 500 mg, functionally scored • Oral Suspension: 5% (250 mg/5 mL), 10% (500 mg/5 mL) (3 ) 3.1 Tablets • 250 mg, slightly yellowish, film-coated, round, functionally scored, imprinted with “BAYER” on one side and “CIP 250” on the other • 500 mg, slightly yellowish, film-coated, capsule shaped, functionally scored, imprinted with “BAYER” on one side and “CIP 500” on the other 3.2 Oral Suspension • 5% Oral Suspension: 250 mg ciprofloxacin per 5 mL after reconstitution • 10% Oral Suspension: 500 mg ciprofloxacin per 5 mL after reconstitution

CIPRO Tablets and Oral Suspension should be administered orally as described in the appropriate Dosage Guidelines tables. Adult Dosage Guidelines Infection Dose Frequency Duration Skin and Skin Structure 500 -750 mg every 12 hours 7 to 14 days Bone and Joint 500-750 mg every 12 hours 4 to 8 weeks Complicated Intra-Abdominal 500 mg every 12 hours 7 to 14 days Infectious Diarrhea 500 mg every 12 hours 5 to 7 days Typhoid Fever 500 mg every 12 hours 10 days Uncomplicated Gonorrhea 250 mg single dose single dose Inhalational anthrax (post-exposure) 500 mg every 12 hours 60 days Plague 500–750 mg every 12 hours 14 days Chronic Bacterial Prostatitis 500 mg every 12 hours 28 days Lower Respiratory Tract 500 -750 mg every 12 hours 7 to 14 days Urinary Tract 250-500 mg every 12 hours 7 to 14 days Acute Uncomplicated Cystitis 250 mg every 12 hours 3 days Acute Sinusitis 500 mg every 12 hours 10 days • Adults with creatinine clearance 30–50 mL/min 250–500 mg q 12 h (2.3 ) • Adults with creatinine clearance 5–29 mL/min 250–500 mg q 18 h • Patients on hemodialysis or peritoneal dialysis 250–500 mg q 24 h (after dialysis) Pediatric Oral Dosage Guidelines Infection Dose Frequency Duration Complicated UTI and Pyelonephritis (1 to 17 years of age) 10–20 mg/kg (maximum 750 mg per dose) Every 12 hours 10–21 days Inhalational Anthrax (Post-Exposure) 15 mg/kg (maximum 500 mg per dose) Every 12 hours 60 days Plague 15 mg/kg (maximum 500 mg per dose) Every 8 to 12 hours 14 days 2.1 Dosage in Adults The determination of dosage and duration for any particular patient must take into consideration the severity and nature of the infection, the susceptibility of the causative microorganism, the integrity of the patient’s host-defense mechanisms, and the status of renal and hepatic function. CIPRO Tablets or CIPRO for Oral Suspension may be administered to adult patients when clinically indicated at the discretion of the physician. Administer CIPRO for Oral Suspension using the co-packaged graduated spoon . Table 1: Adult Dosage Guidelines Infection Dose Frequency Usual Durations Generally ciprofloxacin should be continued for at least 2 days after the signs and symptoms of infection have disappeared, except for inhalational anthrax (post-exposure). Skin and Skin Structure 500–750 mg every 12 hours 7 to 14 days Bone and Joint 500–750 mg every 12 hours 4 to 8 weeks Complicated Intra–Abdominal Used in conjunction with metronidazole. 500 mg every 12 hours 7 to 14 days Infectious Diarrhea 500 mg every 12 hours 5 to 7 days Typhoid Fever 500 mg every 12 hours 10 days Uncomplicated Urethral and Cervical Gonococcal Infections 250 mg single dose single dose Inhalational anthrax (post-exposure) Begin drug administration as soon as possible after suspected or confirmed exposure. 500 mg every 12 hours 60 days Plague 500–750 mg every 12 hours 14 days Chronic Bacterial Prostatitis 500 mg every 12 hours 28 days Lower Respiratory Tract Infections 500–750 mg every 12 hours 7 to 14 days Urinary Tract Infections 250–500 mg every 12 hours 7 to 14 days Acute Uncomplicated Cystitis 250 mg every 12 hours 3 days Acute Sinusitis 500 mg every 12 hours 10 days Conversion of IV to Oral Dosing in Adults Patients whose therapy is started with CIPRO IV may be switched to CIPRO Tablets or Oral Suspension when clinically indicated at the discretion of the physician (Table 2) . Table 2: Equivalent AUC Dosing Regimens CIPRO Oral Dosage Equivalent CIPRO IV Dosage 250 mg Tablet every 12 hours 200 mg intravenous every 12 hours 500 mg Tablet every 12 hours 400 mg intravenous every 12 hours 750 mg Tablet every 12 hours 400 mg intravenous every 8 hours 2.2 Dosage in Pediatric Patients Dosing and initial route of therapy (that is, IV or oral) for cUTI or pyelonephritis should be determined by the severity of the infection. CIPRO should be administered as described in Table 3. Administer CIPRO for Oral Suspension using the co-packaged graduated spoon . Table 3: Pediatric Dosage Guidelines Infection Dose Frequency Total Duration Complicated Urinary Tract or Pyelonephritis (patients from 1 to 17 years of age) 10 mg/kg to 20 mg/kg (maximum 750 mg per dose; not to be exceeded even in patients weighing more than 51 kg) Every 12 hours 10–21 days 1 Inhalational Anthrax (Post-Exposure) 2 15 mg/kg (maximum 500 mg per dose) Every 12 hours 60 days Plague 2,3 15 mg/kg (maximum 500 mg per dose) Every 8 to 12 hours 14 days 1 The total duration of therapy for cUTI and pyelonephritis in the clinical trial was determined by the physician. The mean duration of treatment was 11 days (range 10 to 21 days). 2 Begin drug administration as soon as possible after suspected or confirmed exposure. 3 Begin drug administration as soon as possible after suspected or confirmed exposure to Y. pestis

Dosage Modifications in Patients with Renal Impairment Ciprofloxacin is eliminated primarily by renal excretion; however, the drug is also metabolized and partially cleared through the biliary system of the liver and through the intestine. These alternative pathways of drug elimination appear to compensate for the reduced renal excretion in patients with renal impairment. Nonetheless, some modification of dosage is recommended, particularly for patients with severe renal dysfunction. Dosage guidelines for use in patients with renal impairment are shown in Table 4. Table 4: Recommended Starting and Maintenance Doses for Adult Patients with Impaired Renal Function Creatinine Clearance (mL/min) Dose > 50 See Usual Dosage. 30–50 250–500 mg every 12 hours 5–29 250–500 mg every 18 hours Patients on hemodialysis or Peritoneal dialysis 250–500 mg every 24 hours (after dialysis) When only the serum creatinine concentration is known, the following formulas may be used to estimate creatinine clearance: Men - Creatinine clearance (mL/min) = Weight (kg) x (140–age) 72 x serum creatinine (mg/dL) Women - 0.85 x the value calculated for men. The serum creatinine should represent a steady state of renal function. In patients with severe infections and severe renal impairment, a unit dose of 750 mg may be administered at the intervals noted above. Patients should be carefully monitored. Pediatric patients with moderate to severe renal insufficiency were excluded from the clinical trial of cUTI and pyelonephritis. No information is available on dosing adjustments necessary for pediatric patients with moderate to severe renal insufficiency (that is, creatinine clearance of < 50 mL/min/1.73m 2 )

Important Administration Instructions With Multivalent Cations Administer CIPRO at least 2 hours before or 6 hours after magnesium/aluminum antacids; polymeric phosphate binders (for example, sevelamer, lanthanum carbonate) or sucralfate; Videx ® (didanosine) chewable/buffered tablets or pediatric powder for oral solution; other highly buffered drugs; or other products containing calcium, iron or zinc. With Dairy Products Concomitant administration of CIPRO with dairy products (like milk or yogurt) or calcium-fortified juices alone should be avoided since decreased absorption is possible; however, CIPRO may be taken with a meal that contains these products. Hydration of Patients Receiving CIPRO Assure adequate hydration of patients receiving CIPRO to prevent the formation of highly concentrated urine. Crystalluria has been reported with quinolones. Instruct the patient of the appropriate CIPRO administration . Missed Doses If a dose is missed, it should be taken anytime but not later than 6 hours prior to the next scheduled dose. If less than 6 hours remain before the next dose, the missed dose should not be taken and treatment should be continued as prescribed with the next scheduled dose. Double doses should not be taken to compensate for a missed dose. Splitting CIPRO Tablets CIPRO Tablets, 250 mg and 500 mg are functionally scored tablets which can be split into one-half at the scored line to provide a 125 mg and 250 mg strength, respectively

Directions for Reconstitution of the CIPRO Microcapsules for Oral Suspension CIPRO Oral Suspension is supplied in 5% (5 g ciprofloxacin in 100 mL) and 10% (10 g ciprofloxacin in 100 mL) strengths. CIPRO oral suspension is composed of two components (microcapsules and diluent) that must be combined prior to dispensing. Table 5: Appropriate Dosing Volumes of the Reconstituted Oral Suspensions Dose 5% (250 mg/5 mL) 10% (500 mg/5 mL) 250 mg 5 mL 2.5 mL 500 mg 10 mL 5 mL 750 mg 15 mL 7.5 mL Preparation of the suspension: Step1 The small bottle contains the microcapsules, the large bottle contains the diluent. Step 2 Open both bottles. Child-proof cap: Press down according to instructions on the cap while turning to the left. Step 3 Pour the microcapsules completely into the larger bottle of diluent. Do not add water to the suspension. Step 4 Remove the top layer of the diluent bottle label (to reveal the CIPRO Oral Suspension label). Close the large bottle completely according to the directions on the cap and shake vigorously for about 15 seconds. The suspension is ready for use. Step 5: Write the expiration date of the re-constituted oral suspension on the bottle label. Reconstituted product may be stored below 30°C (86°F) for 14 days. Protect from freezing. No additions should be made to the mixed final ciprofloxacin suspension. CIPRO Oral Suspension should not be administered through feeding or NG (nasogastric) tubes due to its physical characteristics. Step 1 Step 2 Step 3 Step 4 2.6 Administration Instructions for CIPRO for Oral Suspension After Reconstitution • Shake CIPRO Oral Suspension vigorously each time before use for approximately 15 seconds. • Administer CIPRO Oral Suspension using the co-packaged graduated teaspoon provided for the patient Figure 1: Co-packaged 5 mL graduated teaspoon The Co-packaged graduated teaspoon (5mL) is provided, with markings for 1/2 (2.5 mL) and 1/1 (5 mL) • After use, clean the graduated teaspoon under running water with dish detergent and dry thoroughly. • Do Not chew the microcapsules in the CIPRO Oral Suspension, instead swallow them whole. • Water may be taken afterwards. • Reclose the bottle properly after each use according to instructions on the cap. • After treatment has been completed, CIPRO Oral Suspension should not be reused. gradated spoon 2.7 Dosing of CIPRO for Oral Suspension using the Co-Packaged Spoon in Adults and Pediatric Patients Table 6: 5% Cipro for Oral Suspension: 250 mg ciprofloxacin per 5 mL after reconstitution Infection Body weight (kg) Dose by Measuring Spoonful(s) using Co-Packed Spoon* (teaspoonful (s) (volume (mL)) Dose Strength (mg) Complicated Urinary Tract or Pyelonephritis (patients from 1 to 17 years of age) 1 and Plague 2 9 kg to 12 kg ½ teaspoonful (2.5 mL) 125 mg 13 kg to 18 kg 1 teaspoonful (5 mL) 250 mg 19 kg to 24 kg 1 to 1 ½ teaspoonful(s) (5 mL to 7.5 mL) 250 mg to 375 mg 25 kg to 31 kg 1 ½ to 2 teaspoonfuls (7.5 mL to 10 mL) 375 mg to 500 mg 32 kg to 37 kg 1 ½ to 2 ½ teaspoonfuls (7.5 mL to 12.5 mL) 375 mg to 625 mg 38 kg or more 2 to 3 teaspoonfuls (10 mL to 15 mL) 500 mg to 750 mg Inhalational Anthrax (Post-Exposure) 3 9 kg to 12 kg ½ teaspoonful (2.5 mL) 125 mg 13 kg to 18 kg 1 teaspoonful (5 mL) 250 mg 19 kg to 24 kg 1 to 1 ½ teaspoonful(s) (5 mL to 7.5 mL) 250 mg to 375 mg 25 kg or more 2 teaspoonfuls (10 mL) 500 mg * A graduated teaspoon (5mL) with markings 1/2 mL and 1/1 (5 mL) is provided for the patient. 1 Administer every 12 hours for 10-21 days 2 Administer every 8-12 hours for 10-21 days for Pediatric patients ; for adults administer every 12 hours for 14 days 3 Administer every 12 hours for 60 days Table 7: 10% Oral Suspension: 500 mg ciprofloxacin per 5 mL after reconstitution (not appropriate for children weighing less than 13 kg) Infection Body weight (kg) Dose by Measuring Spoonful(s) using Co-Packed Spoon* (teaspoonful (s) (volume (mL)) Dose Strength (mg) Complicated Urinary Tract or Pyelonephritis (patients from 1 to 17 years of age) 1 and Plague 2 13 kg to 24 kg ½ teaspoonful (2.5 mL) 250 mg 25 kg ½ to 1 teaspoonful (2.5 mL to 5 mL) 250 mg to 500 mg 26 kg to 37 kg 1 teaspoonful (5 mL) 500 mg 38 kg or more 1 to 1½ teaspoonful(s) (5 mL to 7.5 mL) 500 mg to maximum dose of 750 mg Inhalational Anthrax (Post-Exposure) 3 13 kg to 24 kg ½ teaspoonful (2.5 mL) 250 mg 25 kg or more 1 teaspoonful (5 mL) 500 mg * A graduated teaspoon (5mL) with markings 1/2 mL and 1/1 (5 mL) is provided for the patient. 1 Administer every 12 hours for 10-21 days 2 Administer every 8-12 hours for 10-21 days for Pediatric patients ; for adults administer every 12 hours for 14 days 3 Administer every 12 hours for 60 days

• Hypersensitivity and other serious reactions: Serious and sometimes fatal reactions (for example, anaphylactic reactions) may occur after the first or subsequent doses of CIPRO. Discontinue CIPRO at the first sign of skin rash, jaundice or any sign of hypersensitivity. ( 4.1 , 5.6 , 5.7 ) • Hepatotoxicity: Discontinue immediately if signs and symptoms of hepatitis occur. • Clostridioides difficile -associated diarrhea: Evaluate if colitis occurs. • QT Prolongation: Prolongation of the QT interval and isolated cases of torsade de pointes have been reported. Avoid use in patients with known prolongation, those with hypokalemia, and with other drugs that prolong the QT interval. ( 5.12 , 7 , 8.5 ) 5.1 Disabling and Potentially Irreversible Serious Adverse Reactions Including Tendinitis and Tendon Rupture, Peripheral Neuropathy, and Central Nervous System Effects Fluoroquinolones, including CIPRO, have been associated with disabling and potentially irreversible serious adverse reactions from different body systems that can occur together in the same patient. Commonly seen adverse reactions include tendinitis, tendon rupture, arthralgia, myalgia, peripheral neuropathy, and central nervous system effects (hallucinations, anxiety, depression, insomnia, severe headaches, and confusion). These reactions can occur within hours to weeks after starting CIPRO. Patients of any age or without pre-existing risk factors have experienced these adverse reactions . Discontinue CIPRO immediately at the first signs or symptoms of any serious adverse reaction. In addition, avoid the use of fluoroquinolones, including CIPRO, in patients who have experienced any of these serious adverse reactions associated with fluoroquinolones

Tendinitis and Tendon Rupture Fluoroquinolones, including CIPRO, have been associated with an increased risk of tendinitis and tendon rupture in all ages . This adverse reaction most frequently involves the Achilles tendon, and has also been reported with the rotator cuff (the shoulder), the hand, the biceps, the thumb, and other tendons. Tendinitis or tendon rupture can occur, within hours or days of starting CIPRO, or as long as several months after completion of fluoroquinolone therapy. Tendinitis and tendon rupture can occur bilaterally. The risk of developing fluoroquinolone-associated tendinitis and tendon rupture is increased in patients over 60 years of age, in patients taking corticosteroid drugs, and in patients with kidney, heart or lung transplants. Other factors that may independently increase the risk of tendon rupture include strenuous physical activity, renal failure, and previous tendon disorders such as rheumatoid arthritis. Tendinitis and tendon rupture have also occurred in patients taking fluoroquinolones who do not have the above risk factors. Discontinue CIPRO immediately if the patient experiences pain, swelling, inflammation or rupture of a tendon. Avoid fluoroquinolones, including CIPRO, in patients who have a history of tendon disorders or have experienced tendinitis or tendon rupture

Peripheral Neuropathy Fluoroquinolones, including CIPRO, have been associated with an increased risk of peripheral neuropathy. Cases of sensory or sensorimotor axonal polyneuropathy affecting small and/or large axons resulting in paresthesias, hypoesthesias, dysesthesias and weakness have been reported in patients receiving fluoroquinolones, including CIPRO. Symptoms may occur soon after initiation of CIPRO and may be irreversible in some patients . Discontinue CIPRO immediately if the patient experiences symptoms of peripheral neuropathy including pain, burning, tingling, numbness, and/or weakness, or other alterations in sensations including light touch, pain, temperature, position sense and vibratory sensation, and/or motor strength in order to minimize the development of an irreversible condition. Avoid fluoroquinolones, including CIPRO, in patients who have previously experienced peripheral neuropathy

Central Nervous System Effects Psychiatric Adverse Reactions Fluoroquinolones, including CIPRO, have been associated with an increased risk of psychiatric adverse reactions, including: toxic psychosis, psychotic reactions progressing to suicidal ideations/thoughts, hallucinations, or paranoia; depression, or self-injurious behavior such as attempted or completed suicide; anxiety, agitation, or nervousness; confusion, delirium, disorientation, or disturbances in attention; insomnia or nightmares; memory impairment. These reactions may occur following the first dose. Advise patients receiving CIPRO to inform their healthcare provider immediately if these reactions occur, discontinue the drug, and institute appropriate care. Central Nervous System Adverse Reactions Fluoroquinolones, including CIPRO, have been associated with an increased risk of seizures (convulsions), increased intracranial pressure (pscudotumor cerebri), dizziness, and tremors. CIPRO, like other fluoroquinolones, is known to trigger seizures or lower the seizure threshold. Cases of status epilepticus have been reported. As with all fluoroquinolones, use CIPRO with caution in epileptic patients and patients with known or suspected CNS disorders that may predispose to seizures or lower the seizure threshold (for example, severe cerebral arteriosclerosis, previous history of convulsion, reduced cerebral blood flow, altered brain structure, or stroke), or in the presence of other risk factors that may predispose to seizures or lower the seizure threshold (for example, certain drug therapy, renal dysfunction). If seizures occur, discontinue CIPRO and institute appropriate care

Exacerbation of Myasthenia Gravis Fluoroquinolones, including CIPRO, have neuromuscular blocking activity and may exacerbate muscle weakness in patients with myasthenia gravis. Postmarketing serious adverse reactions, including deaths and requirement for ventilatory support, have been associated with fluoroquinolone use in patients with myasthenia gravis. Avoid CIPRO in patients with known history of myasthenia gravis

Other Serious and Sometimes Fatal Adverse Reactions Other serious and sometimes fatal adverse reactions, some due to hypersensitivity, and some due to uncertain etiology, have been reported in patients receiving therapy with quinolones, including CIPRO. These events may be severe and generally occur following the administration of multiple doses. Clinical manifestations may include one or more of the following: • Fever, rash, or severe dermatologic reactions (for example, toxic epidermal necrolysis, Stevens-Johnson syndrome); • Vasculitis; arthralgia; myalgia; serum sickness; • Allergic pneumonitis; • Interstitial nephritis; acute renal insufficiency or failure; • Hepatitis; jaundice; acute hepatic necrosis or failure; • Anemia, including hemolytic and aplastic; thrombocytopenia, including thrombotic thrombocytopenic purpura; leukopenia; agranulocytosis; pancytopenia; and/or other hematologic abnormalities. Discontinue CIPRO immediately at the first appearance of a skin rash, jaundice, or any other sign of hypersensitivity and supportive measures instituted

Hypersensitivity Reactions Serious and occasionally fatal hypersensitivity (anaphylactic) reactions, some following the first dose, have been reported in patients receiving fluoroquinolone therapy, including CIPRO. Some reactions were accompanied by cardiovascular collapse, acute myocardial ischemia with or without myocardial infarction, loss of consciousness, tingling, pharyngeal or facial edema, dyspnea, urticaria, and itching. Only a few patients had a history of hypersensitivity reactions. Serious anaphylactic reactions require immediate emergency treatment with epinephrine and other resuscitation measures, including oxygen, intravenous fluids, intravenous antihistamines, corticosteroids, pressor amines, and airway management, including intubation, as indicated

Hepatotoxicity Cases of severe hepatotoxicity, including hepatic necrosis, life-threatening hepatic failure, and fatal events, have been reported with CIPRO. Acute liver injury is rapid in onset (range 1–39 days), and is often associated with hypersensitivity. The pattern of injury can be hepatocellular, cholestatic, or mixed. Most patients with fatal outcomes were older than 55 years old. In the event of any signs and symptoms of hepatitis (such as anorexia, jaundice, dark urine, pruritus, or tender abdomen), discontinue treatment immediately. There can be a temporary increase in transaminases, alkaline phosphatase, or cholestatic jaundice, especially in patients with previous liver damage, who are treated with CIPRO

Risk of Aortic Aneurysm and Dissection Epidemiologic studies report an increased rate of aortic aneurysm and dissection within two months following use of fluoroquinolones, particularly in elderly patients. The cause for the increased risk has not been identified. In patients with a known aortic aneurysm or patients who are at greater risk for aortic aneurysms, reserve CIPRO for use only when there are no alternative antibacterial treatments available

Serious Adverse Reactions with Concomitant Theophylline Serious and fatal reactions have been reported in patients receiving concurrent administration of CIPRO and theophylline. These reactions have included cardiac arrest, seizure, status epilepticus, and respiratory failure. Instances of nausea, vomiting, tremor, irritability, or palpitation have also occurred. Although similar serious adverse reactions have been reported in patients receiving theophylline alone, the possibility that these reactions may be potentiated by CIPRO cannot be eliminated. If concomitant use cannot be avoided, monitor serum levels of theophylline and adjust dosage as appropriate

Clostridioides difficile -Associated Diarrhea Clostridioides difficile (C. difficile)- associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including CIPRO, and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon leading to overgrowth of C. difficile. C. difficile produces toxins A and B which contribute to the development of CDAD. Hypertoxin producing isolates of C. difficile cause increased morbidity and mortality, as these infections can be refractory to antimicrobial therapy and may require colectomy. CDAD must be considered in all patients who present with diarrhea following antibacterial use. Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents. If CDAD is suspected or confirmed, ongoing antibacterial use not directed against C. difficile may need to be discontinued. Appropriate fluid and electrolyte management, protein supplementation, antibacterial treatment of C. difficile , and institute surgical evaluation as clinically indicated

Prolongation of the QT Interval Some fluoroquinolones, including CIPRO, have been associated with prolongation of the QT interval on the electrocardiogram and cases of arrhythmia. Cases of torsade de pointes have been reported during postmarketing surveillance in patients receiving fluoroquinolones, including CIPRO. Avoid CIPRO in patients with known prolongation of the QT interval, risk factors for QT prolongation or torsade de pointes (for example, congenital long QT syndrome, uncorrected electrolyte imbalance, such as hypokalemia or hypomagnesemia and cardiac disease, such as heart failure, myocardial infarction, or bradycardia), and patients receiving Class IA antiarrhythmic agents (quinidine, procainamide), or Class III antiarrhythmic agents (amiodarone, sotalol), tricyclic antidepressants, macrolides, and antipsychotics. Elderly patients may also be more susceptible to drug-associated effects on the QT interval

Musculoskeletal Disorders in Pediatric Patients and Arthropathic Effects in Animals CIPRO is indicated in pediatric patients (less than 18 years of age) only for cUTI, prevention of inhalational anthrax (post exposure), and plague . An increased incidence of adverse reactions compared to controls, including reactions related to joints and/or surrounding tissues, has been observed . In pre-clinical studies, oral administration of CIPRO caused lameness in immature dogs. Histopathological examination of the weight-bearing joints of these dogs revealed permanent lesions of the cartilage. Related quinolone-class drugs also produce erosions of cartilage of weight-bearing joints and other signs of arthropathy in immature animals of various species

Photosensitivity/Phototoxicity Moderate to severe photosensitivity/phototoxicity reactions, the latter of which may manifest as exaggerated sunburn reactions (for example, burning, erythema, exudation, vesicles, blistering, edema) involving areas exposed to light (typically the face, “V” area of the neck, extensor surfaces of the forearms, dorsa of the hands), can be associated with the use of quinolones including CIPRO after sun or UV light exposure. Therefore, avoid excessive exposure to these sources of light. Discontinue CIPRO if phototoxicity occurs

Development of Drug Resistant Bacteria Prescribing CIPRO Tablets and CIPRO Oral Suspension in the absence of a proven or strongly suspected bacterial infection or a prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria

Potential Risks with Concomitant Use of Drugs Metabolized by Cytochrome P450 1A2 Enzymes CIPRO is an inhibitor of the hepatic CYP1A2 enzyme pathway. Co-administration of CIPRO and other drugs primarily metabolized by CYP1A2 (for example, theophylline, methylxanthines, caffeine, tizanidine, ropinirole, clozapine, olanzapine and zolpidem), results in increased plasma concentrations of the co-administered drug and could lead to clinically significant pharmacodynamic adverse reactions of the co-administered drug

Interference with Timely Diagnosis of Syphilis CIPRO has not been shown to be effective in the treatment of syphilis. Antimicrobial agents used in high dose for short periods of time to treat gonorrhea may mask or delay the symptoms of incubating syphilis. Perform a serologic test for syphilis in all patients with gonorrhea at the time of diagnosis. Perform follow-up serologic test for syphilis three months after CIPRO treatment

Crystalluria Crystals of ciprofloxacin have been observed rarely in the urine of human subjects but more frequently in the urine of laboratory animals, which is usually alkaline . Crystalluria related to CIPRO has been reported only rarely in humans because human urine is usually acidic. Avoid alkalinity of the urine in patients receiving CIPRO. Hydrate patients well to prevent the formation of highly concentrated urine

Blood Glucose Disturbances Fluoroquinolones, including CIPRO, have been associated with disturbances of blood glucose, including symptomatic hyperglycemia and hypoglycemia, usually in diabetic patients receiving concomitant treatment with an oral hypoglycemic agent (for example, glyburide) or with insulin. In these patients, careful monitoring of blood glucose is recommended. Severe cases of hypoglycemia resulting in coma or death have been reported. If a hypoglycemic reaction occurs in a patient being treated with CIPRO, discontinue CIPRO and initiate appropriate therapy immediately .

Ciprofloxacin is an inhibitor of human cytochrome P450 1A2 (CYP1A2) mediated metabolism. Co-administration of CIPRO with other drugs primarily metabolized by CYP1A2 results in increased plasma concentrations of these drugs and could lead to clinically significant adverse events of the co-administered drug. Table 11: Drugs That are Affected by and Affecting CIPRO Drugs That are Affected by CIPRO Drug(s) Recommendation Comments Tizanidine Contraindicated Concomitant administration of tizanidine and CIPRO is contraindicated due to the potentiation of hypotensive and sedative effects of tizanidine [ see Contraindications ] Theophylline Avoid Use (Plasma Exposure Likely to be Increased and Prolonged) Concurrent administration of CIPRO with theophylline may result in increased risk of a patient developing central nervous system (CNS) or other adverse reactions. If concomitant use cannot be avoided, monitor serum levels of theophylline and adjust dosage as appropriate . Drugs Known to Prolong QT Interval Avoid Use CIPRO may further prolong the QT interval in patients receiving drugs known to prolong the QT interval (for example, class IA or III antiarrhythmics, tricyclic antidepressants, macrolides, antipsychotics) . Oral antidiabetic drugs Use with caution Glucose-lowering effect potentiated Hypoglycemia sometimes severe has been reported when CIPRO and oral antidiabetic agents, mainly sulfonylureas (for example, glyburide, glimepiride), were co-administered, presumably by intensifying the action of the oral antidiabetic agent. Fatalities have been reported . Monitor blood glucose when CIPRO is co-administered with oral antidiabetic drugs . Phenytoin Use with caution Altered serum levels of phenytoin (increased and decreased) To avoid the loss of seizure control associated with decreased phenytoin levels and to prevent phenytoin overdose-related adverse reactions upon CIPRO discontinuation in patients receiving both agents, monitor phenytoin therapy, including phenytoin serum concentration during and shortly after co-administration of CIPRO with phenytoin. Cyclosporine Use with caution (transient elevations in serum creatinine) Monitor renal function (in particular serum creatinine) when CIPRO is co-administered with cyclosporine. Anti-coagulant drugs Use with caution (Increase in anticoagulant effect) The risk may vary with the underlying infection, age and general status of the patient so that the contribution of CIPRO to the increase in INR (international normalized ratio) is difficult to assess. Monitor prothrombin time and INR frequently during and shortly after co-administration of CIPRO with an oral anti-coagulant (for example, warfarin). Methotrexate Use with caution Inhibition of methotrexate renal tubular transport potentially leading to increased methotrexate plasma levels Potential increase in the risk of methotrexate associated toxic reactions. Therefore, carefully monitor patients under methotrexate therapy when concomitant CIPRO therapy is indicated. Ropinirole Use with caution Monitoring for ropinirole-related adverse reactions and appropriate dose adjustment of ropinirole is recommended during and shortly after co-administration with CIPRO . Clozapine Use with caution Careful monitoring of clozapine associated adverse reactions and appropriate adjustment of clozapine dosage during and shortly after co-administration with CIPRO are advised. NSAIDs Use with caution Non-steroidal anti-inflammatory drugs (but not acetyl salicylic acid) in combination of very high doses of quinolones have been shown to provoke convulsions in pre-clinical studies and in postmarketing. Sildenafil Use with caution Two-fold increase in exposure Monitor for sildenafil toxicity . Duloxetine Avoid Use Five-fold increase in duloxetine exposure If unavoidable, monitor for duloxetine toxicity Caffeine/Xanthine Derivatives Use with caution Reduced clearance resulting in elevated levels and prolongation of serum half-life CIPRO inhibits the formation of paraxanthine after caffeine administration (or pentoxifylline containing products). Monitor for xanthine toxicity and adjust dose as necessary. Zolpidem Avoid Use Co-administration with ciprofloxacin may increase blood levels of zolpidem, concurrent use is not recommended Drug(s) Affecting Pharmacokinetics of CIPRO Antacids, Sucralfate, Multivitamins and Other Products Containing Multivalent Cations (magnesium/aluminum antacids; polymeric phosphate binders (for example, sevelamer, lanthanum carbonate); sucralfate; Videx ® (didanosine) chewable/buffered tablets or pediatric powder; other highly buffered drugs; or products containing calcium, iron, or zinc and dairy products) CIPRO should be taken at least two hours before or six hours after Multivalent cation-containing products administration . Decrease CIPRO absorption, resulting in lower serum and urine levels Probenecid Use with caution (interferes with renal tubular secretion of CIPRO and increases CIPRO serum levels) Potentiation of CIPRO toxicity may occur. Interacting Drug Interaction Theophylline Serious and fatal reactions. Avoid concomitant use. Monitor serum level Warfarin Anticoagulant effect enhanced. Monitor prothrombin time, INR, and bleeding Antidiabetic agents Hypoglycemia including fatal outcomes have been reported. Monitor blood glucose Phenytoin Monitor phenytoin level Methotrexate Monitor for methotrexate toxicity Cyclosporine May increase serum creatinine. Monitor serum creatinine Multivalent cation-containing products including antacids, metal cations or didanosine Decreased CIPRO absorption. Take CIPRO 2 hours before or 6 hours after administration of multivalent cation containing drugs