Smack is a drug obtained from the

Cocaine is obtained from

What is heroin?

Drugs like $LSD$, barbiturates, amphetamines, etc., are used as medicines to help patients with mental illness. However, excessive doses and abusive usage are harmful. Enumerate the major adverse effects of such drugs in humans.

From which of the following are drugs/narcotics generally obtained?

In your locality,if a person is addicted to alcohol,what kind of behavioural changes do you observe in that person? Suggest measures to overcome the problem.