Take Viagra exactly as prescribed by your doctor and follow all directions on your prescription label.
Swallow it as a whole. Do not chew, crush or break it.
For Erectile dysfunction- Take Viagra about 30 minutes to 1 hour before planned sexual activity with or without food and not more than 100 mg per day.
Before starting Viagra, it is important to consult your doctor to ensure it is safe for you, especially if you have pre-existing medical conditions (like heart disease, liver problems, etc.) or take other medications.