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An over-the-counter (OTC) drug is a medicine that can be bought without a prescription from a healthcare professional. Learn about the regulation, usage, and examples of OTC drugs in different countries.
Paracetamol (acetaminophen) is a common over-the-counter medication for fever and mild to moderate pain. It is safe and effective in the short term, but can cause liver damage with high doses or chronic use.
Diphenhydramine is a first-generation antihistamine used to treat allergies, insomnia, and other conditions. It is also a potent anticholinergic and deliriant at high doses. Learn about its medical uses, side effects, interactions, and history.
Overmedication is the excessive use of over-the-counter or prescription medicines for a person. It can have harmful effects, such as non-adherence, interactions, or addiction. Learn about the types, causes, and examples of overmedication, such as acetaminophen, codeine, DXM, and antibiotics.
The Durham–Humphrey Amendment explicitly defined two specific categories for medications, legend (prescription) and over-the-counter (OTC). This amendment was co-sponsored by then Senator (and later Vice President) Hubert H. Humphrey Jr., who was a pharmacist in South Dakota before beginning his political career. [1]
A prescription drug is a pharmaceutical drug that requires a medical prescription to be dispensed. Learn how prescription drugs are regulated in different jurisdictions, such as Australia, the UK, and the US, and what are the categories and schedules of controlled substances.
Learn about the definition, classification, uses, and side effects of NSAIDs, a group of drugs that reduce pain, inflammation, fever, and blood clots. Find out how NSAIDs work, what types of NSAIDs exist, and how they compare with other anti-inflammatory drugs.
Methamphetamine is a potent central nervous system (CNS) stimulant that is mainly used as a recreational drug and less commonly as a treatment for ADHD and obesity. It exists as two enantiomers, levo- and dextro-methamphetamine, and the hydrochloride salt is widely known as crystal meth.