What is Charas?

Which of the following is an opiate narcotic?

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.

Match List $I$ with List $II$.

List $I$	List $II$
$A$. Heroin	$I$. Effect on cardiovascular system
$B$. Marijuana	$II$. Slow down body function
$C$. Cocaine	$III$. Painkiller
$D$. Morphine	$IV$. Interfere with transport of dopamine

Choose the correct answer from the options given below:

Which chemical substance affects the coronary artery disease?

Which of the following substances inhibits brain activity and produces feelings of relaxation,drowsiness,and calmness?