Viagra (sildenafil citrate) — Uses, Dosage, Side Effects & Safety

Drug class: Phosphodiesterase type 5 (PDE5) inhibitor

Overview

Viagra is a prescription medication used to treat erectile dysfunction (ED) in adult men. It helps men achieve and maintain an erection sufficient for sexual activity by increasing blood flow to the penis. Viagra works by blocking an enzyme called phosphodiesterase type 5 (PDE5), which allows blood vessels in the penis to relax and widen during sexual stimulation. Viagra does not cure ED or increase sexual desire; it only works with sexual stimulation. It is not intended for use in women or children. Patients should take Viagra as directed by their healthcare provider and be aware of potential side effects and interactions.

Therapeutic uses

• Erectile dysfunction
• Pulmonary arterial hypertension
• Benign prostatic hyperplasia (off-label)

For related Viagra guidance, compare Cialis (tadalafil), Sildenafil (oral route) - Side effects & dosage and Udenafil.

Common side effects

• Headache
• Flushing
• Dyspepsia
• Nasal congestion
• Visual disturbances
• Priapism
• Sudden hearing loss
• Hypotension

Frequently Asked Questions about Viagra

How long does Viagra take to work?

Viagra usually starts to work within 30 to 60 minutes after taking the tablet. Sexual stimulation is required for it to be effective.

How long does the effect of Viagra last?

The effects of Viagra typically last for 4 to 5 hours, but this can vary depending on individual response and other factors.

Can I take Viagra with food?

Yes, Viagra can be taken with or without food. However, a high-fat meal may delay its onset of action.

Is Viagra safe for everyone?

Viagra is not safe for everyone. It should not be used by people taking nitrates, those with severe heart or liver problems, or those with certain eye conditions. Always consult your doctor before use.

Can women use Viagra?

Viagra is not approved for use in women and its safety and effectiveness in women have not been established.

What should I do if I experience side effects?

If you experience mild side effects, they often resolve on their own. For serious symptoms such as chest pain, vision or hearing loss, or a prolonged erection, seek immediate medical attention.

Can I drink alcohol while taking Viagra?

Alcohol can increase the risk of side effects such as dizziness and low blood pressure. It is best to limit or avoid alcohol when taking Viagra.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.