"Whether wine is a nourishment, medicine or poison is a matter of dosage"

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Further, Dr. Gold said with a straight face, the pill at optimum dosage could have the side effect of impotence. Until that moment, although I'd had some trouble with his personality, I had not thought him totally lacking in perspicacity; now I was not all sure. Putting myself in Dr. Gold's shoes, I wondered if he seriously thought that this juiceless and ravaged semi-invalid with the shuffle and the ancient wheeze woke up each morning from his Halcion sleep eager for carnal fun.

— William Styron