Viagra (Sildenafil): Uses, Effects, and Erectile Dysfunction Treatment
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Recommended dosage: Take 1 tablet (50mg sildenafil) about 30 minutes before sexual activity. Do not exceed one tablet within 24 hours unless advised by a healthcare professional.
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Harm reduction advice: Viagra does not protect against sexually transmitted infections (STIs) or pregnancy. Use protection such as condoms and consult a healthcare provider if you take nitrate medications or have heart-related conditions.
Viagra is one of the most widely recognized medications for treating erectile dysfunction (ED). Originally introduced by Pfizer in 1996, it became the first FDA-approved oral treatment for ED and remains a leading option today. The active ingredient, sildenafil, belongs to a class of medications called PDE5 inhibitors. It works by relaxing smooth muscles and increasing blood flow to the penis, helping men achieve and maintain a firm erection during sexual stimulation. Erectile dysfunction is a common condition affecting millions of men worldwide, including more than 3 million men aged 40 and older in Canada.
Viagra typically works quickly and remains effective for about 4–6 hours. Because it targets blood flow rather than libido, sexual arousal is still required for the medication to produce an erection. It is usually taken orally about 30 minutes before anticipated sexual activity and can be consumed with or without food. While Viagra is effective for ED caused by reduced blood circulation, other underlying causes—such as hormonal imbalances—may require different treatments, so consulting a healthcare professional is recommended.
