how long does it take viagra to work

Viagra typically takes about 30 to 60 minutes to start working for most people, though it can sometimes work as quickly as 12 minutes or take up to 2 hours depending on various factors. The effects usually last for about 4 to 6 hours. The medication helps improve blood flow to the penis to facilitate an erection, but sexual arousal is necessary for it to work. Factors like dosage, body weight, age, meals (especially high-fat meals), other medications, and individual metabolism can influence how long it takes Viagra to start working and how long its effects last. For best results, it is often recommended to take Viagra about an hour before sexual activity and avoid grapefruit juice and heavy meals around the time of taking it.