What is Sildenafil Citrate: Uses, Warnings & Interactions

Updated Jan. 13, 2021  •  Published Dec. 30, 2020

Sildenafil Citrate overview

BRAND NAMES:

  • Revatio, Viagra, Viagra

Generic Names:

  • Sildenafil Citrate

Uses:

  • Treats erectile dysfunction. Also treats pulmonary arterial hypertension (high blood pressure in the lungs).

Therapeutic Classes:

  • Antihypertensive, Peripheral Vasodilator, Erectile Dysfunction Agent

Forms:

  • Tablet, Liquid

How it’s taken:

  • By mouth

What form(s) does Sildenafil Citrate come in

  • Tablet

  • Liquid

What are common Sildenafil Citrate doses?

  • Tablet 20MG

  • Tablet 25MG

  • Tablet 50MG

  • Tablet 100MG

  • Vial 12.5ML of 10MG/12.5ML

  • Bottle 25GM of

  • Bottle 112ML of 10MG/ML

Common Sildenafil Citrate prescriptions

  • Sildenafil Citrate
    112ml of 10mg/ml bottle

  • Sildenafil Citrate
    100mg tablet

  • Sildenafil Citrate
    20mg tablet

  • Sildenafil Citrate
    25mg tablet

  • Sildenafil Citrate
    50mg tablet

  • Sildenafil Citrate
    12.5ml of 10mg/12.5ml vial

How to take Sildenafil Citrate

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • For erectile dysfunction: Take this medicine about 1 hour before you have sex. Do not take it more than once a day. Always allow at least 24 hours between doses.

  • For pulmonary arterial hypertension: Take this medicine 3 times a day, 4 to 6 hours apart.If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • Oral liquid: Shake the bottle well for at least 10 seconds. Use the oral syringe provided in the package to measure each dose. Wash the syringe after each use.

  • Read and follow the patient instructions that come with this medicine. Talk to your doctor or pharmacist if you have any questions.

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

  • Throw away any unused mixed oral liquid after 60 days.

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

  • For pulmonary arterial hypertension: Take this medicine 3 times a day, 4 to 6 hours apart.If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • For erectile dysfunction: Take this medicine about 1 hour before you have sex. Do not take it more than once a day. Always allow at least 24 hours between doses.

  • Read and follow the patient instructions that come with this medicine. Talk to your doctor or pharmacist if you have any questions.

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Oral liquid: Shake the bottle well for at least 10 seconds. Use the oral syringe provided in the package to measure each dose. Wash the syringe after each use.

  • Throw away any unused mixed oral liquid after 60 days.

Sildenafil Citrate contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to sildenafil.

Sildenafil Citrate warnings

  • Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, pulmonary veno-occlusive disease, diabetes, bleeding problems, leukemia, multiple myeloma, sickle cell anemia, a stomach ulcer, or eye problems. Tell your doctor if you have angina or chest pain during sex, heart disease, heart rhythm problems, high or low blood pressure, or a history of heart attack or stroke. Also tell your doctor if you smoke.

  • Tell any doctor who treats you that you take sildenafil.

  • This medicine may cause the following problems: Low blood pressure (especially if taken with other medicines that lower blood pressure)Heart problemsPainful or prolonged erectionVision or hearing problems

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • Painful erection or an erection that lasts longer than 4 hours

  • Sudden loss of vision

  • Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness

Sildenafil Citrate interactions

  • Do not use this medicine if you also use riociguat or a nitrate medicine. Do not take other medicines that contain sildenafil or similar medicines, such as tadalafil or vardenafil.

  • Some medicines can affect how sildenafil works. Tell your doctor if you are using any of the following: Amlodipine, atazanavir, bosentan, cimetidine, erythromycin, indinavir, itraconazole, ketoconazole, rifampin, ritonavir, saquinavirMedicine for prostate problems or high blood pressure (including alfuzosin, doxazosin, prazosin, silodosin, tamsulosin, terazosin)

  • This medicine may cause the following problems: Low blood pressure (especially if taken with other medicines that lower blood pressure)Heart problemsPainful or prolonged erectionVision or hearing problems

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Sildenafil Citrate side effects

Serious Side Effects

  • Sudden loss of vision

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Chest pain, trouble breathing, sudden or severe headache

  • Fast, slow, pounding, or uneven heartbeat

  • Lightheadedness, fainting

  • Painful erection or an erection that lasts longer than 4 hours

  • Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness

Less Serious Side Effects

  • Upset stomach

  • Headache

  • Stuffy or runny nose

  • Nosebleeds

  • Warmth or redness in your face, neck, arms, or upper chest