[This information from Consumer Reports might be of interest to anyone who takes Viagra and has to pay full price without insurance.]
Viagra (sildenafil) comes in 25-, 50- and 100-mg pills, none of which are slated to become available as generic until 2019. But sildenafil is also sold as Revatio, a 20-mg pill for pulmonary arterial hypertension that will become available as a generic in September 2012. (Pfizer makes both drugs.) Men who take the 25-mg dose of Viagra ($23 a pill) could talk with their doctor about switching to a 20-mg pill of generic sildenafil (expected to drop to $10 a pill by March 2013). Those who take higher doses of Viagra are better off staying with the branded version for now. But by 2015, generic sildenafil is expected to cost $1 a pill; at that point, men who take 50 or 100 mg of Viagra might combine multiple 20-mg pills of generic sildenafil.