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Sildenafil 100mg is the highest safe dosage you can take – if it is ineffective, you should try another ED treatment. It is the generic cialis tadalafil version of Viagra, which means it contains the same active ingredient (sildenafil citrate) and works in the same way. If you take more than your prescribed dose, like taking 2 doses in 1 day, this can increase the risk of side effects and potentially dangerous complications, including permanent damage to your penis. When you take Viagra, the active ingredient, sildenafil, relaxes the smooth muscles in the penis blood vessels, increasing blood flow which causes an erection. Persistent erection problems can be a sign of an underlying condition, so if you experience erectile issues for a long time (even after taking erectile dysfunction tablets) you should consult your doctor.

Avoid consumption of alcohol as it may impair your ability to get an erection. Taking SILDENAFIL after a heavy meal might take longer time for the medicine to work