Viagra, or sildenafil, works by inhibiting an enzyme called phosphodiesterase-5 (PDE5). This enzyme normally breaks down cyclic guanosine monophosphate (cGMP), a molecule crucial for achieving and maintaining an erection. By blocking PDE5, Viagra allows cGMP levels to rise, leading to increased blood flow into the penis.
Timing and Absorption
Oral absorption of Viagra varies, but generally, effects start within 30 to 60 minutes after taking the pill. Factors like food intake can influence absorption rate; taking it on an empty stomach usually leads to faster onset. The maximum blood concentration is typically reached within 1 to 4 hours. The duration of action is usually around 4 hours.
Individual Variations
Individual responses to Viagra differ. Several factors influence how quickly and effectively it works, including age, overall health, and the presence of other medical conditions. Always consult your doctor for personalized advice.
