Simvastatin seems unlikely to cause impotence.
Pedersen
T R
TR
Faergeman
O
O
D007172:Erectile Dysfunction / Q000139:chemically induced*; D006801:Humans; D000960:Hypolipidemic Agents / Q000009:adverse effects*; D008297:Male; D019821:Simvastatin / Q000009:adverse effects*
D000960:Hypolipidemic Agents; D019821:Simvastatin