In one sentence The FDA is the United States agency that regulates foods, drugs, cosmetics and medical devices, including how they are approved, labelled and made.
The FDA regulates foods, drugs, cosmetics and devices
The Food and Drug Administration (FDA) is a branch of the United States Department of Health and Human Services, responsible for the regulation of foods, drugs, cosmetics and medical devices. It oversees the approval of new drugs, the labelling of over-the-counter and prescription drugs, and the standards related to the manufacture of drugs. Regulation is what turns a chemical with a promising effect into a product whose identity, strength, purity and claims can be relied upon batch after batch. For this course the important consequence is that a medicine on the shelf is the end of a long official process, not simply a substance that somebody decided to sell. The FDA considers a new chemical entity to be an active pharmaceutical ingredient that has not been approved for marketing in the United States.
Two tablets labelled as the same product may come from different batches, but the manufacturing standards enforced through regulation are what make them interchangeable.
Regulation works like a quality stamp on a product, but with a limit: the stamp guarantees identity, strength and purity batch after batch, not that the drug is right for a particular patient.
Name the four product groups the FDA regulates.
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Foods, drugs, cosmetics and medical devices; the agency also oversees new drug approval, labelling and manufacturing standards.
Read detailed explanations
- From approval to withdrawal: what pharmacovigilance changes
A drug is approved on the evidence available at the time, gathered from pre-clinical testing and clinical trials whose size is limited by cost, time and ethics. That evidence is strong enough to show benefit in a defined population, but it is not strong enough to describe everything that will happen when the drug is used by millions of people of different ages, with different diseases, taking different combinations of medicines. Phase IV exists to fill that gap. As the drug is used to treat patients, it is continuously monitored; reports about efficacy and toxicity are received from medical practitioners and reviewed by a committee for the review of medicines, and renewal or cancellation of the product licence depends on that committee’s comment. Several things can change as a result. A new serious adverse effect can lead to a warning, a restriction to certain patients, a requirement for monitoring, or withdrawal from the market. A signal that the drug works in a group that was not studied can extend the licence. The important idea for a beginner is that approval is a provisional judgement based on the best evidence so far, not a permanent guarantee. Pharmacovigilance is the mechanism that keeps that judgement honest, and every health worker who reports a suspected adverse effect is contributing to it.
- Why storage conditions are chemical conditions
A stored medicine is a chemical system that continues to react slowly with its environment. Light supplies energy that can break bonds, which is why products are protected by opaque containers or kept away from sunlight. Heat accelerates almost every chemical reaction, so a syrup left in a hot car degrades faster than the same syrup in a cool cupboard. Moisture changes the water content of a tablet or powder, which can hydrolyse the active ingredient, soften a coating or encourage microbial growth — hence the instruction to keep products in a cool, dry place. Oxygen in the air oxidises susceptible molecules, which is why some preparations are sealed under nitrogen or supplied in sealed ampoules. The container matters for the same reason: a well-closed, light-resistant pack is part of the formulation, not just packaging. This is where the storage guidelines and the label instructions meet. FEFO, FIFO and LIFO control how long a product waits before use; “cool, dry place” and “keep away from sunlight” control how fast it degrades while it waits. Both aim at the same outcome: the patient receives the amount stated on the label. They also explain the special caution around extemporaneous compounding, where the pharmacy creates a product without the manufacturer’s stability testing, so its shelf-life is short and its storage instructions must be given explicitly.