Making a Killing: The Untold Story of Psychotropic Drugging is one of the best documentaries I've found that deals with this topic, mostly with the same attitude and skepticism that Adam and John bring.
It was made by the Citizens Commission on Human Rights, which, for what it's worth, is a group I just now looked up and have basically no knowledge of.
Here is their description:
"Psychotropic drugs. It’s the story of big money—drugs that fuel a $330 billion psychiatric industry, without a single cure. The cost in human terms is even greater—these drugs now kill an estimated 42,000 people every year. And the death count keeps rising. Containing more than 175 interviews with lawyers, mental health experts, the families of victims and the survivors themselves, this riveting documentary rips the mask off psychotropic drugging and exposes a brutal but well-entrenched money-making machine."
Full Film (1:34:43):