A substance used as a medication or in the preparation of medication.
The doctor prescribed a new drug to help manage her symptoms.
A substance that has a physiological effect when ingested or otherwise introduced into the body, especially one that is illegal or used recreationally.
He was arrested for possession of illegal drugs.
Something that produces a strong, often addictive attraction or pleasure when experienced; a figurative source of dependency.
For many people, social media has become a drug they cannot live without.
drugverb
To administer a drug to someone, especially to induce stupor or insensibility.
The doctor had to drug the patient before the surgery to ensure they felt no pain.
To add a drug to food or drink, often secretly, to affect someone’s behavior or consciousness.
The villain planned to drug the hero's drink to incapacitate him.