The mature seeds of the opium poppy are used as:

$L.S.D.$ is a/an ...... .

With repeated use of drugs,the tolerance level of the receptors in our body:

Which analgesic drug acts on the neurons of the brain?

Drugs obtained from opium bind to specific receptors present in our $CNS$. Heroin,commonly called smack,is chemically $..........$,which is a white,odorless,bitter,crystalline compound. This is obtained by $..........$ of morphine.

Diacetylmorphine is extracted from . . . . . . .