You'd better stop that or you'll go blind!

F.D.A. Gets Reports of Blindness Tied to Male Impotence Drugs - New York Times

You don't get the intersection af anold wives tale and a herd (Heh! I said "Herd") science story very often... From the above linked story:

The Food and Drug Administration said today that it had received reports of partial vision loss among 38 men taking Viagra, the impotence drug, and among four men taking Cialis, a newer competitor.

Whether the popular impotence drugs can actually cause blindness is unclear, but the Food and Drug Administration said it had suggested changes in the drugs' labeling as a precaution.

Pfizer Inc., the maker of Viagra, is in talks with the agency to list vision loss among the drug's side effects, while the makers of Cialis, Eli Lilly & Company and the Icos Corporation, have already added such a warning.

Yep! the warning labels may indeed include language that paraphrases to "If you keep it up you'll go blind!"


Heh! indeedy!