Withdrawal - The physical and psychological symptoms that occur when someone stops using a substance they are dependent on.
Prescription medicine - Medications that can only be obtained with a written order from a healthcare professional.
Overdose - Taking an excessive amount of a substance that results in severe and potentially dangerous reactions.
Intoxication - The state of being under the influence of a substance that impairs physical and mental faculties.
Tolerance - The need for increased amounts of a substance to achieve the desired effect, or a diminished effect with continued use of the same amount.
Medicine - Substances used to diagnose, treat, cure, or prevent diseases or medical conditions.
Illegal drugs - Substances that are prohibited by law and have no recognized medical use.
Illicit drug use - The use of illegal drugs or the misuse of prescription medications.
Substance abuse - The excessive or harmful use of substances, including both legal and illegal drugs.
Drugs - Any natural or synthetic substances that can have physiological or psychological effects on the body.
Addiction - A chronic brain disorder characterized by compulsive substance use despite harmful consequences.
Over-the-counter medicines - Medications that can be purchased without a prescription from a healthcare professional.