Is "hard drug" a technical term in that it has a functional definition!

When people say hard drugs I think of heroin and cocaine!. Soft drugs I think of as alcohol and pot!. But is the distinction meaningful!. If you measure harmful effects, then heroin taken in a controlled setting, as is the case in the UK, produces constipation as the main side-effect!. It seems that alcohol is a deadly and addictive as any of the so-called hard drugs but I never hear anyone refer to it that way!. Even Prozac leads people to suicide!.

My point is, is there a measurable distinction based on criteria such as addictiveness, bodily harm, mental harm, harm to family, that can be used to distinguish drugs!?Www@Answer-Health@Com

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