Brand names: Revatio
Revatio is used to treat high blood pressure in the lungs (pulmonary arterial hypertension), with the goal of improving exercise ability. The drug works by helping the blood vessels of the lungs relax so that blood and oxygen can flow more freely. Revatio contains the same generic ingredient as Viagra.
Revatio should never be combined with certain products (see "Possible food and drug interactions when taking Sildenafil citrate"). Be sure to tell your doctor about all medications and supplements you are taking.
Take one Revatio tablet three times a day. Take each tablet about 4 to 6 hours apart, at about the same time each day. Revatio can be taken with or without food.
Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Sildenafil citrate.
Do not take Revatio if you already take medications containing nitrates. This includes nitroglycerin for chest pain. You should also avoid Sildenafil citrate if you are allergic to any of its ingredients.
Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Revatio. Also, talk to your doctor about your complete medical history, especially if you have ever had the following:
In rare cases, men taking drugs such as sildenafil for erectile dysfunction had a sudden decrease or loss of sight in one or both eyes. It is not possible to know if these cases are directly caused by these drugs or other factors. If you experience a sudden decrease or loss of sight while taking Revatio, call your doctor immediately.
Never combine Revatio with the following:
Drugs containing nitrates, including nitroglycerinAntifungal drugs such as ketoconazole and itraconazoleRitonavir (an anti-HIV drug)Viagra, which contains sildenafil, the same ingredient that's in Revatio
If Revatio is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Revatio with the following:
Alpha-blockers such as doxazosinAnti-HIV drugsBarbituratesBosentanCarbamazepineRifabutinRifampinPhenytoinVitamin K antagonists
The effects of Revatio during pregnancy and breastfeeding are unknown. Talk with your doctor before taking Sildenafil citrate if you are pregnant, plan to become pregnant, or are breastfeeding.
The recommended dose is 20 milligrams three times a day.
Any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical attention immediately.