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Viagra ® (sildenafil citrate) is contraindicated in patients who are taking organic nitrates in any form at any time.

Consistent with its known effects on the nitric oxide/cGMP pathway, Viagra ® was shown to potentiate the hypotensive effects of nitrates and its administration to patients who are concurrently using organic nitrates in any form is therefore contraindicated.

Viagra ® is indicated for the treatment of Erectile Dysfunction.

The following is a list of some commonly prescribed Nitrates by class.
This list is illustrative. It is not meant to be all-inclusive.



  Deponit® (transdermal)

Schwarz Pharma., Inc.

  Nitrek (transdermal)

Bertek Pharmaceuticals, Inc.


Hoechst Marion Roussel


G.D. Searle Company


Key Pharmaceuticals, Inc.


Forest Pharmaceuticals, Inc.


Kenwood Laboratories

  Nitrlingual Spray®

Rhone-Poulenc Rorer Pharmaceuticals, Inc.

  Nitrol® Ointment (Apoll-Kit)®

Savage Laboratories


Rhone-Poulenc Rorer Pharmaceuticals, Inc.


Parmed Pharmaceuticals




Time-Cap Laboratories


Novartis Pharmaceuticals Corporation

 Isosorbide Mononitrate


Key Pharmaceuticals, Inc.


Wyeth-Ayerst Laboratories

  Monoket® Tablets

Scharz Pharma, Inc.

 Isosorbide Dinitrate


Scharz Pharma, Inc.


Wyeth-Ayerst Laboratories


Zeneca Pharmaceuticals

 Erythatyl Tetranitrate

 Pentaerythritol Tetranitrate

 Sodium Nitroprusside

Substances such as amyl nitrite (poppers), which are sometimes abused, should never be combined with Viagra®. Viagra® is not contraindicated with nitrates found in food.

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