Carton of four Viagra (Sildenafil citrate) tablets, Sandwich, England, 1996-1998
Viagra is issued under prescription as an anti-impotence drug for erectile dysfunction. It is the brand name for sildenafil citrate and has become one of the best-selling pharmaceutical products in history. This carton contains four blue 50 mg Viagra pills. They were manufactured by pharmaceutical company Pfizer Limited. Viagra was patented in 1996. It originally treated the heart condition angina, but became the first pill to treat impotence. One tablet is taken up to an hour before sex.
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Also known as a pill, it is made by compressing a powdered form of one or more drugs. It is usually taken by mouth, but may be inserted into a different body cavity.
Glossary: materia medica
A Latin medical term sometimes used to refer to medical substances.
The inability to gain an erection, or for long enough to sustain intercourse. Around one in ten men are affected regularly, and most men experience erectile dysfunction at some point.