01 Medication Names and Pharmacology Foundations

Medication, class, and indication

A medication, also called a drug, is a substance used to prevent, diagnose, relieve, or treat a health condition. An indication is the condition or purpose for which a medicine is used. A medicine may have multiple indications.

A drug class groups medicines by a shared feature. A pharmacologic class describes how medicines work, while a therapeutic class describes what they treat. A medicine may belong to more than one class.

For example, lisinopril is an ACE inhibitor and is used for high blood pressure, among other indications. Its class describes a group of medicines; its indication describes a use. Neither fact alone establishes an appropriate dose or whether the medicine is suitable for a particular person.

Generic and brand names

The generic name identifies the active drug ingredient. The brand name is a manufacturer’s proprietary name for a product containing that ingredient. One generic medicine can have multiple brand names, and a brand-name product can contain more than one active ingredient.

Combination-product names are especially important to check. Zestoretic contains lisinopril and hydrochlorothiazide, while lisinopril alone is also sold under other brand names.

In the United States, an FDA-approved generic is expected to have the same active ingredient, strength, dosage form, route, and intended use as its reference brand drug, and to be bioequivalent. Inactive ingredients and appearance can differ.

For study and safe communication, learn the generic name first and connect it to representative brand names. Do not assume that every brand version has the same formulation or that every brand remains on the market.

Representative medication examples

These representative examples connect generic names with brand examples, classes, and common indications. They are not complete prescribing information.

• Lisinopril — Prinivil or Zestril; ACE inhibitor; used for high blood pressure and also used in heart failure and after some heart attacks.

• Metformin — Glucophage; biguanide; used for type 2 diabetes.

• Atorvastatin — Lipitor; statin (HMG-CoA reductase inhibitor); used to lower cholesterol and reduce the risk of heart attack or stroke.

• Albuterol — Ventolin HFA or ProAir HFA; bronchodilator and short-acting beta agonist; used for relief or prevention of wheezing and breathing difficulty in conditions such as asthma.

Brand availability and approved uses can vary by product and change over time. Confirm a specific product’s ingredients and uses with an up-to-date drug reference or a clinician or pharmacist.

Practice medication recall

Active recall means trying to retrieve information from memory before checking notes. It is more useful than repeatedly rereading a list because it reveals what can and cannot be recalled.

A useful recall template is generic name → brand example → class → common indication. Put the generic name on one side of a card and recall a brand, class, and common indication on the other. Then reverse the direction by seeing an indication or class and retrieving a matching generic. Examples include “metformin → Glucophage, biguanide, type 2 diabetes” and “statin → atorvastatin, Lipitor.”

Shuffle prompts rather than studying one drug class at a time. Include close contrasts, such as ACE inhibitors versus statins, so that recalling an answer requires identifying the distinguishing clue.

After each attempt, check the answer in a trusted reference. Mark missed or uncertain items for another round, and keep facts about a drug separate from facts about a particular brand formulation. Re-test difficult items at increasing intervals, such as later the same day, the next day, and several days later. Keep sessions brief and repeat until recall is accurate.

Treat indications as study associations, not as instructions to start, stop, or change medication.