Revatio (Sildenafil) is used to treat pulmonary arterial hypertension, a serious heart and lung condition. When hypertension occurs in the lungs, the heart must work harder to pump enough blood through the lungs. This medication helps by relaxing and widening the blood vessels in your lungs which allows the blood to flow more easily. Decreasing high blood pressure in the lungs allows your heart and lungs to work better and improves your ability to exercise.

Doctor's prescription is required to use this medicine.

Revatio (Sildenafil) is used to treat pulmonary arterial hypertension, a serious heart and lung condition. When hypertension occurs in the lungs, the heart must work harder to pump enough blood through the lungs. This medication helps by relaxing and widening the blood vessels in your lungs which allows the blood to flow more easily. Decreasing high blood pressure in the lungs allows your heart and lungs to work better and improves your ability to exercise.

Doctor's prescription is required to use this medicine.

Always use sildenafil exactly as directed by your doctor. Before taking sildenafil, tell your doctor or pharmacist if you are allergic to it or any other medications.

Tell your doctor or pharmacist about your medical history. Tell your doctor about all the other prescription and nonprescription medications you are taking. Taking Revatio with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

Tell all your healthcare providers that you are taking sildenafil. If you ever need emergency medical treatment for a heart problem, the healthcare providers who treat you will need to know when you last took sildenafil.

If you are a woman and you are taking sildenafil to treat PAH, tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. If you become pregnant while taking sildenafil, call your doctor.

Stop using Revatio and get emergency medical help if you have sudden vision loss.

NOTE: This medicine is only for you. Do not share this medicine with others.

Sildenafil may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• headache

• heartburn

• diarrhea

• flushing (feeling of warmth)

• nosebleeds

• difficulty falling asleep or staying asleep

• numbness, burning, or tingling in the arms, hands, feet, or legs

• muscle aches

• changes in color vision (seeing a blue tinge on objects or having difficulty telling the difference between blue and green)

• sensitivity to light

Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately:

• sudden severe loss of vision (see below for more information)

• blurred vision

• sudden decrease or loss of hearing

• ringing in ears

• dizziness or lightheadedness

• fainting

• chest pain

• worsening shortness of breath

• erection that is painful or lasts longer than 4 hours

• itching or burning during urination

• rash

Sildenafil may cause other side effects. Call your doctor if you have any unusual problems while you are taking this medication.

What happens if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What happens if I overdose?

In case of overdose, call the poison control helpline. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services.

Where should I keep my medicine?

Keep out of reach of children. Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medicine after the expiration date.

What should I avoid while taking Revatio?

Drinking alcohol with Revatio can cause side effects. Grapefruit may interact with sildenafil and lead to unwanted side effects. Avoid the use of grapefruit products. Avoid using any other medicines to treat impotence, without first talking to your doctor.