Prescription onlyLower-cost generic available



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  • Liquid
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Lowers blood pressure in your lungs.

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Prescription onlyLower-cost generic available

Our bottom line

Revatio (Sildenafil) is a first-choice treatment for pulmonary hypertension (high blood pressure in the lungs).


  • It's a first-choice medication for treating high blood pressure in the lungs.
  • It's available as a generic medication.
  • Different doses of Sildenafil (the active ingredient) are also used to treat erectile dysfunction.


  • Can cause dizziness during the first few days.
  • If you're using Revatio (Sildenafil) for high blood pressure in the lungs, you can't use Viagra or other erectile dysfunction drugs.
  • You also can't use other forms of nitrates or nitroglycerin while taking Revatio (Sildenafil).

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What to expect when you take Revatio (Sildenafil)

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Tips from our pharmacists
  • You need to take this medication at the same time every day.
  • Can cause a headache, flushing, or nosebleeds.
  • Don't take two doses at the same time if you missed a dose.
  • The oral liquid (suspension) is good for 60 days or 2 months. Make sure to shake it well before using.
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Side effects for Revatio (Sildenafil)

From clinical trials of Revatio / Pulmonary arterial hypertension 

  • Retinal hemorrhageRetinal hemorrhage2% for Revatio vs.0% for placebo

Risks and Warnings for Revatio (Sildenafil)

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  • People on Revatio (Sildenafil) can get low blood pressure. Be very careful getting up from a sitting or lying down position since this can make you feel dizzy and more likely to fall. Talk to your doctor if this is an issue.

Means that some groups have a high risk of experiencing this side effect

Tips from pharmacists and people taking Revatio (Sildenafil)

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The FDA category for this medication is B. It is advised that you: Probably safe
  • Risks from our pharmacists
  • There have been reports of men having an erection lasting more than 4 hours while on Revatio (Sildenafil). This has been rare. If not treated in time, this can cause permanent damage to your penis, including impotence. Talk to your doctor immediately or go to the emergency room if this happens.