VIAGRA and Drug Interactions
Although VIAGRA (sildenafil citrate) can be taken with most medicines, it can have interactions with some drugs. That’s why it’s important to tell your doctor about all medications you are taking.
Be sure to tell your doctor if you take any of the following drugs to avoid potential interactions with VIAGRA:
Nitrates
You should NOT take VIAGRA with nitrates. If you take any medicines that have nitrates in them (like nitroglycerin for chest pain)—every day or even once in a while—do NOT take VIAGRA. Nitrates are also found in recreational drugs such as amyl nitrate (“poppers”). Do not take VIAGRA if you take nitrates, often prescribed for chest pain, as this may cause a sudden, unsafe drop in blood pressure. If you are not sure if any of your medicines contain nitrates, or if you do not understand what nitrates are, ask your doctor or pharmacist.
Alpha-blockers
If you have prostate problems or high blood pressure for which you take medicines called alpha-blockers, your doctor may start you on a lower dose of VIAGRA.
Protease inhibitors
If you are taking protease inhibitors, such as for the treatment of HIV, your doctor may recommend a 25-mg dose and may limit you to a maximum single dose of 25 mg of VIAGRA in a 48-hour period.
REVATIO
VIAGRA should not be used with REVATIO or other products containing sildenafil.
Other drugs that enable erections.
VIAGRA should not be used with other ED treatments.
Click here to learn more about the potential side effects of VIAGRA.
  • Patients should always ask their doctors for medical advice about adverse events.
  • You may report an adverse event related to Pfizer products by calling 1-800-438-1985 (U.S. only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. The FDA has established a reporting service known as MedWatch where health care professionals and consumers can report serious problems they suspect may be associated with the drugs and medical devices they prescribe, dispense, or use. Visit MedWatch or call 1-800-FDA-1088.
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