Viagra contains sildenafil citrate, a selective phosphodiesterase type 5 inhibitor. It works by supporting the blood-flow mechanisms involved in penile erection when sexual stimulation is present.
Sildenafil is an established treatment for erectile dysfunction. The supplied product identifies a 100mg tablet strength, while appropriate dosing depends on individual factors such as age, other medicines, cardiovascular status, and treatment response.
Important interactions include nitrate medicines and certain alpha-blockers or blood-pressure treatments. Headache, flushing, indigestion, nasal congestion, and visual changes are among recognized adverse effects.
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