Summary of Pharmaceutical and Medical Terminology

## Introduction Medication vocabulary is the set of words and phrases used to describe drugs, how they work, how they are given, and how patients may respond. This guide breaks down essential terms into clear sections, gives practical examples, and highlights real-world applications so you can learn and use these words confidently in clinical or everyday conversations. ## 1. General medical terms > **pharmaceutical drug** – a substance used to prevent, diagnose, treat, or cure disease > **medication / medicine** – a drug used to treat or prevent illness > **active ingredient** – the component of a drug that produces the intended therapeutic effect > **vehicle** – the form or carrier of a drug (e.g., tablet, syrup, cream) > **dosage** – instructions on how much and how often to take a drug > **dose** – the specific amount of drug given at one time > **route of administration** – the path by which a drug is taken into the body (oral, IV, etc.) > **bolus** – a single, often rapid, large dose given to achieve an immediate effect > **over-the-counter drugs (OTC)** – medicines available without a prescription > **prescription-only medicine (POM)** – medicines that require a prescriber's authorization > **behind-the-counter medication (BTM)** – medicines dispensed by a pharmacist without a prescription but with pharmacist involvement > **off-label use** – using an approved drug for an indication, dose, or population not officially authorized Practical example: A patient buys an OTC analgesic to relieve a headache; if symptoms persist, a doctor may prescribe a POM with a different active ingredient. ## 2. Drug classes (what drugs do) > **antipyretics** – drugs that reduce fever > **analgesics** – drugs that relieve pain > **antimalarials** – drugs to prevent or treat malaria > **antibiotics** – drugs that kill or inhibit bacteria > **antiseptics** – substances applied to living tissues to reduce infection risk > **hypnotics** – drugs that promote sleep > **anaesthetics** – drugs that block sensation, may be local or general > **antipsychotics** – drugs to manage psychosis and severe mental illness > **antidepressants** – drugs to treat depression and some anxiety disorders > **NSAIDs** – nonsteroidal anti-inflammatory drugs that reduce pain and inflammation > **opioids** – powerful pain relievers with risk of dependence > **bronchodilators** – drugs that widen airways for conditions like asthma > **antitussives** – cough suppressants > **mucolytics** – drugs that thin mucus > **decongestants** – relieve nasal congestion > **antifungals** – treat fungal infections > **antileprotics** – drugs against leprosy > **antituberculous drugs** – treat tuberculosis > **immunosuppressants** – reduce immune activity (used in transplants, autoimmune disease) > **immunoglobulins** – antibody preparations used for passive immunity > **interferons** – proteins with antiviral and immune-modulating effects > **monoclonal antibodies** – targeted biological therapies for diseases (e.g., some cancers, autoimmune disorders) > **cytotoxic drugs** – agents that kill rapidly dividing cells (used in chemotherapy) > **contrast media** – substances used to improve imaging visibility Table: Common drug classes and typical uses | Drug class | Typical use | Example |---|---:|---| | Analgesics | Pain relief | acetaminophen | NSAIDs | Pain + inflammation | ibuprofen | Antibiotics | Bacterial infection | amoxicillin | Bronchodilators | Asthma/COPD | salbutamol | Antifungals | Fungal infection | clotrimazole Did you know that some drugs can belong to multiple classes depending on dose and effect, for example low-dose opioids for pain and high-dose opioids for anesthesia? ## 3. Routes and administration > **oral administration** – taken by mouth > **parenteral administration** – delivered by injection or infusion (bypasses GI tract) > **intravenous (IV)** – into a vein for rapid, systemic effect > **intramuscular (IM)** – into