Phosphodiesterase-5 Inhibitors
Products Phosphodiesterase-5 inhibitors are commercially available in the form of film-coated tablets and meltable tablets. Sildenafil (Viagra) was the first active ingredient from this group to be approved in the United States, the EU, and many countries in 1998. Generics are also available today. Sildenafil was originally to be developed by Pfizer for the treatment … Phosphodiesterase-5 Inhibitors
