Which of the following are considered drugs of abuse?

Cocaine is commonly called as $:-$

Nicotine is an alkaloid that enters the body through smoking. How many of the following characteristics are associated with its effects?
$(i)$ Increases blood pressure
(ii) Decreases respiratory rate
(iii) Causes cancer of the lungs,throat,and bladder
(iv) Induces allergies
$(v)$ Can cause emphysema
(vi) Decreases the level of $O_2$ in the blood

Identify the sedative and the cardiovascular-affecting components,respectively.

Which analgesic drug acts on the neurons of the brain?

Morphine is extracted from