Valium (diazepam). Mother’s little helper. The most famous of all benzos, celebrated in songs and novels. Probably the only thing that kept me from going more insane during my long manic period of the 1990s, unless his smoking all that pot really helped after all. Freakiest side effects: the only good ones are the paradoxical effects of rage and hallucinations. The dosage is anywhere from 2-10 mg a day, depending on what it’s prescribed for. I’ve taken up to 30 mg a day without ill effect. Maybe more, as I lost count of how many injections he had in the hospital that one time. Valium’s half-life is 30-60 hours. Roche.