Sildenafil typically takes about 30 to 60 minutes to start working after it is taken. The exact timing can vary depending on factors like dosage, whether it is taken on an empty stomach or with a heavy meal, individual metabolism, and overall health. Sildenafil requires sexual stimulation to work and does not automatically induce an erection. Its effects usually last for about 4 to 6 hours, but the medication may remain in the bloodstream for up to 12 hours in some cases.
