Here's a random quote from a mainstream medical source:
"Mood disorders similar to hypomania and mania can be elicited during intoxication with amphetamines. Depression can occur during withdrawal, and repeated use of amphetamines can produce antidepressant-resistant amphetamine-induced depression. ..."
- "Amphetamine-Related Psychiatric Disorders" (emphasis added), http://emedicine.medscape.com/article/289973-overview
Mad in America makes the case that mental health treatment is a make-work endeavor. http://www.madinamerica.com/