What is Viagra?
Viagra (sildenafil) relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body. 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. This page contains specific information for Viagra, not Revatio. Do not take Viagra while also taking Revatio, unless your doctor tells you to.
What to avoid
Drinking alcohol with this medicine can cause side effects. Grapefruit and grapefruit juice may interact with sildenafil and lead to unwanted side effects. Avoid the use of grapefruit products while taking sildenafil. Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.
Viagra side effects
- ringing in your ears, or sudden hearing loss;
- irregular heartbeat;
- swelling in your hands, ankles, or feet;
- shortness of breath;
- seizure (convulsions); or
- a light-headed feeling, like you, might pass out.
Common Viagra 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.
What to avoid
Drinking alcohol with this medicine can cause side effects. Grapefruit and grapefruit juice may interact with sildenafil and lead to unwanted side effects. Avoid the use of grapefruit products while taking sildenafil. Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.
What does Viagra do to a man?
What is Viagra? Viagra (sildenafil) is a prescription drug used to treat erectile dysfunction (ED) in men. Viagra can't cure ED or increase sexual desire. Instead, it relaxes muscles and increases blood flow to cause an erection.
How long does a viagra take to work?
It usually takes 30 to 60 minutes for sildenafil to work for erectile dysfunction. You can take it up to 4 hours before you want to have sex. Taking sildenafil alone will not cause an erection. You need to be aroused for it to work.
Does viagra make you bigger?
If you have erectile dysfunction and normally find it difficult to get a complete erection, Viagra might cause your erection to feel bigger than normal. However, it will not make your penis physically larger than its regular size.
How Much Viagra Should I take the first time?
The usual first-time dose of Sildenafil (Viagra) is one 50mg tablet, which is taken with a glass of water an hour before the time you're planning to have sex. Viagra is also available in doses of 25mg and 100mg, so your prescriber will be able to advise whether a lower or higher dose might suit you better.
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