Verkkoit's best to take sildenafil (viagra) about 1 hour before sex, but you can take it anywhere between 30 minutes and 4 hours before you need it. Verkkodo not take viagra more than once per day. The dose may be adjusted based on doctor recommendations, but it should not exceed 100 mg per dose. Verkkoyou take the blue pill—the story ends, you wake up in your bed and believe whatever you want to believe. You take the red pill—you stay in.