Pharmacology and Drug Classification
Core concepts
Build a working map of drug classes, their mechanisms, therapeutic uses, and major adverse effects. You should be able to group drugs by class (for example, antibiotics, antihypertensives, antidiabetics, analgesics, anticoagulants, bronchodilators, and psychotropics) and connect each class to its typical indication and its most important safety concern. Understand the difference between a drug's generic name, brand name, and class, and know why look-alike/sound-alike names are a safety risk. Know the concepts of therapeutic index, contraindication, and the difference between an adverse effect and a side effect.
Traps in questions
Examiners often pair a drug with a plausible but wrong class, or ask for the most important adverse effect rather than any effect. Watch for questions that confuse indication with contraindication. Another common trap is a drug that belongs to two categories (for example, a medicine that is both analgesic and antipyretic) where only one answer fits the stem. Be careful with "all of the following except" formats and with options that use brand names when the stem uses a generic.
Rule of thumb
Anchor each drug to one class, one main use, and one key safety warning. When two options seem correct, choose the one that matches the specific wording of the stem (class vs. use vs. effect).
Worked example
A question asks which concern is most important to flag for a patient starting an anticoagulant. The best answer focuses on bleeding risk and signs of bleeding, because that is the class-defining safety issue, rather than on a minor effect such as mild nausea.