Now that it has been widely reported the actor was on Vyvanse is this just another step drug to Heroin or cocaine? Or is it the ADHD?
No, the problem was he didn't have a pharmacist to dose and monitor for other drug interactions. In addition, police found a virtual pharmacopoeia of prescription drugs. Some seem to have legitimate medical uses, such as clonidine hydrochloride, a drug to treat high blood pressure, and buprenorphine, used to treat drug addiction. But other drugs are often abused. They include Vyvanse, used to treat hyperactivity and muscle relaxer methocarbamol.
To me, it's unusual an ADHD'er would even want to mess with opiates. We do things like cigarettes, caffeine, and amphetamines.