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20 MG Sildenafil

20 MG Sildenafil

What Is Sildenafil?

Sildenafil is the chemical name for the active ingredient in viagra . Sildenafil is in the group of medicines that doctors call PDE-5 inhibitors. This medicine is also sold under the name Revatio to treat adults with pulmonary arterial hypertension (high blood pressure in the lungs). Revatio is given to improve exercise ability and slow down worsening changes in people with this condition.

How to take sildenafil

Your Lemonaid doctor will recommend the appropriate starting dose based on all the information you provide. Typically our doctors prescribe the 60mg as a starting dose, which means taking 3 of the 20mg pills at a time.Never take more than one dose in 24 hours. Do not eat grapefruit or drink grapefruit juice on the same day you take sildenafil because it increases the chance of side effects.

How should I use this medication?

The recommended adult dose of sildenafil for pulmonary hypertension is 20 mg 3 times daily. Doses should be taken approximately 6 to 8 hours apart.Sildenafil may be taken with or without food.The solution for injection is used to continue treatment with sildenafil when a person with pulmonary hypertension is temporarily unable to take sildenafil by mouth. The maximum dose of this form of sildenafil is 10 mg given by intravenous (into a vein) injection 3 times a day. This dose of sildenafil is approximately equal in activity to 20 mg of sildenafil taken by mouth.

Who should NOT take this medication?

Do not take sildenafil if you:

  • are allergic to sildenafil or any ingredients of the medication
  • are taking nitroglycerin (sprays, ointments, skin patches or pastes, tablets) or other nitrate medications (e.g., isosorbide dinitrate or isosorbide mononitrate) due to the risk of developing dangerously low blood pressure
  • have pulmonary hypertension caused by sickle cell anemia (a red blood cell abnormality)

Side Effect

Tell your doctor if any of the following side effects become severe or don’t go away:

  • Headache
  • Diarrhea
  • Upset stomach
  • Dizziness
  • Heartburn
  • Runny or stuffy nose
  • Nosebleeds
  • Flushing
  • Difficulty falling or staying asleep
  • Numbness or tingling in the hands, arms, feet, or legs
  • Muscle pain or back pain
  • Sensitivity to light


Viagra comes as a 25 milligram (mg), 50 mg, or 100 mg tablet to take by mouth.

Typically, the recommended dose is 50 mg taken about one hour before sexual activity. But you can take Viagra anywhere from 30 minutes to four hours before you have sex.

This medicine usually shouldn’t be used more than once a day.


If you suspect an overdose, contact a poison control center or emergency room immediately.


You’re unlikely to miss a dose of Viagra since the medicine is taken as needed.