The influence of drugs refers to how substances such as medications or illicit drugs can affect an individual's brain chemistry, physiology, emotions, thoughts, perceptions, and behaviors.
Related terms
Pharmacology: This term refers to the scientific study of drugs and their effects on living organisms.
Psychoactive Substances: These are chemicals that alter consciousness, mood, perception or behavior by affecting neurotransmission.
Tolerance: This term describes how repeated exposure to a drug requires higher doses over time for it to have the same effect due to decreased responsiveness.