VIAGRAUsual dose
50 milligrams (mg) a day 10 mg a day 10 mg a day
Maximum doses
100 mg a day 20 mg a day 20 mg a day
Available as
20 mg, 25 mg, 50 mg and 100 mg tablets 2.5 mg, 5 mg, 10 mg and 20 mg tablets 5 mg, 10 mg and 20 mg tablets
How to take
Without food Without food With or without food
When to take
30 to 60 minutes before sexual activity 30 to 60 minutes before sexual activity 30 minutes before sexual activity
Duration of effects
Up to four hours Up to four hours 24 to 36 hours
How often to use
Up to once a day Up to once a day Up to once a day
Side effects
Headache, flushing, indigestion, stuffy or runny nose, upset stomach, diarrhea Headache, flushing, indigestion, stuffy or runny nose, upset stomach, dizziness Headache, indigestion, back pain, muscle aches, flushing, stuffy or runny nose
Warnings
Do not take with nitrates (Nitro-Dur, others), or if you have certain heart valve problems. Should be used with caution or not used at all with alpha blockers. Should not be used with some antibiotic, antiviral or antifungal medications. Do not take with nitrates (Nitro-Dur, others) or alpha blockers (Hytrin, Cardura, others), or if you have certain heart valve problems. Should be used with caution or not used at all with alpha blockers. Should not be used with some antibiotic, antiviral or antifungal medications. Do not take with nitrates (Nitro-Dur, others) or alpha blockers (Hytrin, Cardura, others), or if you have certain heart valve problems. Should be used with caution or not used at all with alpha blockers. Should not be used with some antibiotic, antiviral or antifungal medications.
Shelf life
2 years 3 years 1 year
Alcohol interaction
Not recomended Not recomended Not recomended
Special conditions
Sexual stimulation Sexual stimulation Sexual stimulation
BY PFIZER-VIVA
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