Drugs like barbiturates, amphetamines, benzodiazepines, lysergic acid diethyl amides ($LSD$) and other similar drugs are normally used as medicines to help patients cope with mental illness. From the ergot of mustard seed, lysergic acid is formed, from that $LSD$ is produced.

Amphetamines are stimulating pills. People who keep awake at night, use Amphetamines, its effect resemble cocaine.

Barbiturates are a medicine which makes a person feels comfort and relief, they are also known as sleeping pills.

Morphine is a very effective sedative and painkiller and is useful in patients who have undergone surgery.