TUESDAY, Oct. 25 (HealthDay News) -- New research suggests that the active ingredient in the erectile dysfunction drug Viagra, which was initially developed as a treatment for heart disease, could help children with a rare condition called pulmonary arterial hypertension.

Tadalafil, known under the brand name Cialis for the treatment of erectile dysfunction and Adcirca for pulmonary arterial hypertension, is a PDE5 inhibitor. Its main competitors are sildenafil citrate (Viagra) and vardenafil (Levitra). Tadalafil's chemical formula is C22H19N3O4. Cialis became nicknamed "the weekend pill" because its effects last 36 hours. Viagra and Levitra are effective for up ...

Viagra is the brand name for Sildenafil citrate, and is used for treating erectile dysfunction and pulmonary arterial hypertension. Originally developed by scientists in Great Britain, it was brought onto the market by Pfizer Inc., a US pharmaceutical company. Viagra is also sold under brand name Revatio. Sildenafil citrate's chemical formula is C22H30N6O4S. Viagra works by inhibiting an enzyme ...

The Milwaukee Teachers' Education Association (MTEA) union is asking a judge to force the region's school board to reinstate Viagra and other erectile dysfunction drugs to their taxpayer-funded health care coverage, according to a Friday report by Associated Press (AP) writer Ryan J. Foley.According to Foley, "The filing is the latest in a two-year legal campaign in which the union has ...

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