Viagra is an oral drug for male impotence, also known as erectile
dysfunction (ED). It works by dilating blood vessels in the penis,
allowing the inflow of blood needed for an erection. Most important fact about Viagra
Viagra causes erections only during sexual excitement. It does not
work in the absence of arousal. How should you take Viagra?
Taking Viagra approximately 1 hour before sexual activity works best
for most men. Depending on how and when the drug works for you, an
interval of one-half hour to as much as 4 hours may prove ideal.
If you miss a dose
Viagra is not for regular use. Take it only before sexual activity.
Storage instructions
Store at room temperature. Viagra side effects
Side effects cannot be anticipated. If any develop or change in intensity,
inform your doctor as soon as possible. Only your doctor can determine
if it is safe for you to continue taking Viagra.
* Side effects may include:
Abnormal vision (color tinge, blurring, sensitivity to light), acid
indigestion, diarrhea, flushing, headache, nasal congestion, urinary
tract infection
Heart attack, stroke, heart irregularities, dangerous surges in blood
pressure, and sudden death have all been reported after use of Viagra,
usually in men with existing cardiac risk factors, and typically during
or shortly after sex. Why should Viagra not be prescribed?
Do not take Viagra if you are taking any nitrate-based drug, including
nitroglycerin patches (Nitro-Dur, Transderm-Nitro), nitroglycerin ointment
(Nitro-Bid, Nitrol), nitroglycerin pills (Nitro-Bid, Nitrostat), and
isosorbide pills (Dilatrate-SR, Isordil, Sorbitrate). Combining Viagra
with these drugs can cause a severe drop in blood pressure.
If Viagra gives you an allergic reaction, do not use it again. Special warnings about Viagra
If you have heart problems severe enough to make sexual activity a
danger, you should avoid using Viagra. Use it cautiously--if at all--if
you've had a heart attack, stroke, or life-threatening heart irregularities
within the past 6 months. Be equally cautious if you have severe high
or low blood pressure, heart failure, or unstable angina (crushing
heart pain that occurs at any time).
If you take Viagra and develop cardiac symptoms (for example, dizziness,
nausea, and chest pain) during sexual activity, do not
