Date: 2009-02-26 15:12:26

Biology

Medicine

Epimedium

Icariin

Aphrodisiac

Sildenafil

CGMP-specific phosphodiesterase type 5

Phosphodiesterase

Erectile dysfunction

Alternative medicine

Medicinal plants

PDE5 inhibitors

Horny Goat Weed Photo by SPHL, Wikipedia Encyclopedia

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