Stramonium is a drug obtained from the plant species of

When does withdrawal syndrome occur?

From which part of the plant $Erythroxylum$ $\text{coca}$ is cocaine obtained?

Which are the drugs that are normally used as medicines to help patients cope with mental illnesses like depression and insomnia and are often abused?

Which of the following is a white crystalline drug associated with pain relief and euphoria?

Sedatives and tranquillisers are often given for treating