This is true of any parent whose child has any sort of physical, psychological, or emotional issue. It's not for sissies, folks. Your shoulders ache from bearing the weight, but it's part of the job ... and part of loving your child.
There are types of drugs, such as alcohol and heroin, have a dampening effect. There are other stimulant drugs Kalokayen, The third category, which includes cannabis and its derivatives (marijuana and hashish), they are hallucinogens that lead people to be modified to recognize what is going on around them. http://hopeeg.com/how-drugs-affect-the-brain