Every drug company seems to believe that synthetic drugs targeting specific maladies can work in the same way for everyone. This idea is marketed to physicians and consumers and has dangerous repercussions: it encourages physicians to prescribe higher drug doses than are necessary; it ignores individual metabolic variations; and it creates a synergy in which more toxic drugs are prescribed in attempts to reduce the side effects of other medications.
In one study, 30 percent of people on Prozac quit after experiencing side effects. The Journal of Clinical Psychiatry reported that 85 percent of Prozac users suffered diarrhea, 70 percent experienced profuse sweating, and 50 percent gained weight. Despite these and other reported side effects, Prozac’s manufacturer, Eli Lily, continued recommending that doctors prescribe 20 milligrams or more as the starting dose.
“So when a patient develops a side effect, rather than simply reducing the dose without any extra cost to anyone,” reports Cohen in Over Dose, “doctors do what they know best–write another prescription.[…]”
The Hundred-Year Lie by Randall Fitzgerald, pg. 127-29.