medication
Meaning of medication: From a swallowed tablet to a skin patch, the form is chosen to suit how the substance must travel to reach its target.
Definition of medication
A medication is a substance manufactured, regulated and given for a medical purpose: preventing disease, treating a condition, or relieving its symptoms. Medications come in many forms, among them tablets, capsules, liquids, injections, inhalers, patches and creams, each matched to a route by which the substance can reach the part of the body it needs to act on.
How does the form relate to the route?
The physical form of a medication is a practical answer to the question of how the substance gets where it must work.
| Form | Route | Why it is chosen |
|---|---|---|
| Tablet or capsule | Swallowed | Convenient and stable, but the gut and liver alter the dose that arrives |
| Injection or infusion | Into a vein, muscle or the fat under the skin | Bypasses the gut; used when absorption must be reliable or fast |
| Inhaler | Breathed into the airways | Delivers the drug where it acts, so less reaches the rest of the body |
| Cream or ointment | Applied to the skin | A topical effect at the site, with limited absorption |
| Patch | Through the skin into the blood | A slow, steady release over hours or days |
How is a medication regulated?
Before a medication is sold, it is normally tested in stages to establish what it does, how much benefit it offers and what harms it can cause. A national or regional authority then reviews that evidence and decides whether the product may be marketed and on what terms. Manufacture, labeling and advertising are regulated too, as is the way the product is supplied. Some medications require a prescription from an authorized clinician, while others are sold directly. Which category a given product falls into is a regulatory decision that differs between countries, so the same substance can be prescription-only in one place and freely sold in another.
Is a medication the same as a drug?
The two words are used interchangeably in most clinical settings. Drug is the broader term. It covers substances taken outside any medical purpose, including recreational and illicit ones, and in pharmacology it also names the active substance itself rather than the finished product. Medication points specifically at therapeutic use. A related distinction separates the active ingredient from the product: the same active drug appears under a generic name and one or more brand names, in different strengths and forms. No medication acts only where it is wanted, which is why an unwanted side effect is described alongside the intended one.
Also known as
Used in a sentence
The discharge instructions listed each medication along with its dose and schedule.
Good to know
Medication and drug are used interchangeably in clinical settings, but drug also covers substances taken outside a medical context, a distinction that matters when a full substance history is being recorded.