Take Viagra exactly as prescribed by a doctor
Swallow the tablet whole with water
Take it about 30 to 60 minutes before sexual activity
Do not take more than one dose in 24 hours
Avoid taking it with a high-fat meal if you want it to work faster
Do not take it with nitrates or “poppers”
Do not take it with other erectile dysfunction medicines unless your doctor says to
Avoid heavy alcohol use before taking it
Follow your doctor’s instructions for dose and timing
Seek urgent medical help if you have chest pain, sudden vision loss, sudden hearing loss, or an erection lasting more than 4 hours