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  • Treats erectile dysfunction
  • Convenient and discreet usage
  • Can be taken between 30 minutes and 4 hours prior to intercourse

Sildenafil (generic Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection.

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Experiencing ED? You’re not alone.

Over 50% of men experience erectile dysfunction.
– Source

If you are taking sildenafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. Sildenafil does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). 

Special Precautions 

  • Do not take sildenafil if you are taking or have recently taken Nitrate medications. This includes: isosorbide dinitrate (Isordil), isosorbide mononitrate (Monoket), and nitroglycerin. Nitrates come as tablets, sublingual (under the tongue) tablets, sprays, patches, pastes, and ointments. 
  • Do not take street drugs containing nitrates such as amyl nitrate and butyl nitrate (‘poppers’) while taking sildenafil. 
  • Tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take. Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Many other medications may also interact with sildenafil, so be sure to tell your doctor about all the medications you are taking. 
  • If you are taking sildenafil to treat erectile dysfunction, tell your doctor if you have ever been advised by a healthcare professional to avoid sexual activity for medical reasons or if you have ever experienced chest pain during sexual activity. Sexual activity may be a strain on your heart, especially if you have heart disease. If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise. 
  • 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. 

What side effects can this medication cause?

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 


Take sildenafil as needed before sexual activity. The best time to take sildenafil is about 1 hour before sexual activity, but you can take the medication any time from 4 hours to 30 minutes before sexual activity. Sildenafil usually should not be taken more than once every 24 hours.

If you have certain health conditions or are taking certain medications, your doctor may tell you to take sildenafil less often. You can take sildenafil with or without food. However, if you take sildenafil with a high-fat meal, it will take longer for the medication to start to work. 


Sildenafil SR Tablets: 36mg, 75mg, 110mg

Sildenafil Troches: 50mg or 100mg

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