Sildenafil Citrate well know as the name of Viagra, Revatio, etc.
Sildenafil Citrate/Viagra Usage:
For Erectile Dysfunction: the usual dosage is take 50mg once half-an-hour or oncehour before sexual activity. The maximum dosage is 100mg once per day. But Sildenafil Citrate alone can not result in harder erection.
For pulmonary arterial dysfunction: take 20mg thrice per day. The injectable Sidenafil Citrate must also be taken three times in a day. And maintain a gap of 4-6hours between doses.
Warning on Sildenafil Citrate/Viagra
The most common side effects of Sildenafil Citrate are nasal congestion, stomach pain, headaches, nose bleeding, mild ache, diarrhea, and sleeping troubles. Some serious ones are memory loss, blurred vision, tremors, shortness of breath