Sildenafil

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Sildenafil

Sildenafil drug image
Brand Viagra
Form Oral Tablet
Drug Type Erectile dysfunction agents

 

Sildenafil relaxes muscles of the blood vessels and increases blood flow to particular areas of the body.

 

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Drug Information

Sildenafil relaxes muscles of the blood vessels and increases blood flow to particular areas of the body.

Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio , which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.

Do not take Viagra while also taking Revatio, unless your doctor tells you to.

Sildenafil may also be used for purposes not listed in this medication guide.

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Revatio is usually taken three times each day, about 4 to 6 hours apart.

Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take Viagra more than once per day.

Shake the oral suspension (liquid) before you measure a dose. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).

Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor's instructions.

During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of sildenafil.

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop taking sildenafil and get emergency medical help if you have:

  • heart attack symptoms --chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating;
  • vision changes or sudden vision loss; or
  • erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis).

Call your doctor at once if you have:

  • severe shortness of breath, cough with foamy mucus;
  • ringing in your ears, or sudden hearing loss;
  • irregular heartbeat;
  • swelling in your hands, ankles, or feet;
  • a seizure; or (convulsions); or
  • a light-headed feeling, like you might pass out.
  • Common side effects may include:
  • flushing (warmth, redness, or tingly feeling);
  • headache, dizziness;
  • abnormal vision (blurred vision, changes in color vision)
  • runny or stuffy nose, nosebleeds;
  • sleep problems (insomnia);
  • muscle pain, back pain; or
  • upset stomach.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Drinking alcohol with this medicine can cause side effects.

Grapefruit may interact with sildenafil and lead to unwanted side effects. Avoid the use of grapefruit products.

Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.

Do not take sildenafil with similar medications such as avanafil (Stendra), tadalafil (Cialis) or vardenafil (Levitra). Tell your doctor about all other medications you use for erectile dysfunction.

Tell your doctor about all your other medicines, especially:

  • drugs to treat high blood pressure or a prostate disorder;
  • antifungal medicine --ketoconazole or itraconazole; or
  • medicine to treat HIV/AIDS --ritonavir and others.

This list is not complete. Other drugs may affect sildenafil, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

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