Carton of four Viagra (Sildenafil citrate) tablets, Sandwich, England, 1996-1998
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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.