Brand names:

• Viagra

• Revatio

Sildenafil is the generic name of Viagra or Revatio. It is also known as “the little blue pill”. This medicine relaxes muscles of the blood vessels and increases blood flow to areas of the body including the penis.

Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men.

Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.

Do not take Viagra while also taking Revatio, unless your doctor tells you to.

Sildenafil may also be used for purposes not listed in this medication guide.

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The active ingredient in Viagra is sildenafil and is used to treat erectile dysfunction. Many men prefer Viagra to other options such as Cialis (tadalafil) and Levitra(vardenafil).

Dosage forms & Strengths:

Tablet (Revatio)

• 20mg

Tablet (Viagra)

• 25mg

• 50mg

• 100mg

Injectable solution (Revatio)

• 10mg/12.5mL

Oral suspension (Revatio)

• 10mg/mL (when reconstituted) How should you take sildenafil?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use sildenafil exactly as directed. The brand sildenafil known as Viagra should be taken 30-60 minutes before sexual activity. It’s important to take it without a meal because fat in a meal can decrease and delay its absorption, which can lower sildenafil’s effectiveness. You may take it up to four hours before sexual activity. Do not take Viagra more than once per day. Revatio is usually taken three times each day, about four to six hours apart. If you are taking the oral suspension (liquid), shake well before you measure a dose. If you miss a dose of Revatio, take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time. Store at room temperature away from moisture and heat.

How long does sildenafil take to work?

Sildenafil (Viagra) is a short acting medication with a rapid onset. It reaches peak blood levels in 60 minutes on average. However, consuming a fatty meal immediately prior to taking Viagra can slow absorption and effectiveness.

Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill.

How long does sildenafil last?

Sildenafil is a short acting drug and usually lasts 4–5 hours but this does not mean you will maintain an erection for this long.

The time that it takes to eliminate sildenafil may be prolonged in older people and people with liver or kidney disease.

What happens if I overdose?

Seek emergency medical attention.

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What should I tell my healthcare provider before taking Sildenafil?

It is important to tell your healthcare provider your complete medical history before taking any medication.

Tell your doctor if you have ever had or may be:

• heart problems; high or low blood pressure; blood circulation problems; retinitis pigmentosa ;

• blindness in one or both eyes;

• bleeding problems;

• a stomach ulcer;

• pulmonary veno-occlusive disease (PVOD);

• liver or kidney disease;

• a blood cell disorder such as sickle cell

• anemia, multiple myeloma, or leukemia;

• a physical deformity of the penis;

• if you have been told you should not have sexual intercourse for health reasons

• pregnant or breastfeeding

Do not give this medication to anyone under 18 years old without medical advice.

What other drugs interact with Sildenafil?

Tell your doctor about all your current medicines and any you start or stop using, especially:

• drugs to treat high blood pressure or a prostate disorder;

• antifungal medicine–ketoconazole or itraconazole; or

• medicine to treat HIV/AIDS–ritonavir and others. This list is not complete. Other drugs may interact with this medication, including prescription and over-the-counter medicines, vitamins, and herbal products. Too much alcohol may affect the effectiveness of Viagra. Moderate amounts of alcohol while taking Viagra seems to be safe.

What are the possible side effects of sildenafil?

Get emergency medical help if you have signs of an allergic reaction to drug: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop taking sildenafil and get emergency medical help if you have:

• heart attack symptoms–chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating;

• vision changes or sudden vision loss; or

• erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis).

Common side effects may include:

• flushing (warmth, redness, or tingly feeling);

• headache, dizziness;

• abnormal vision (blurred vision, changes in color vision)

• runny or stuffy nose, nosebleeds;

• sleep problems (insomnia);

• muscle pain, back pain; or

• upset stomach.

This is not a complete list of side effects and others may occur.