About this test
Drug classification is Domain 1 material and among the most predictable points on the PTCE: if you can place a drug in its class, you can usually reason your way to its indication, its common side effects, and its major interactions. This quiz drills that single skill across the classes that dominate US dispensing.
The fastest route to class recognition is the generic-name suffix. Once you know that -statin means an HMG-CoA reductase inhibitor and -pril means an ACE inhibitor, an unfamiliar drug name stops being a dead end. Every answer here is cited so you can confirm the class and its logic.
New to the material? Work through our 2026 PTCB study guide first, then reinforce it with the drug-class study guides and the top 200 drugs list by class.
Key concepts to know
Learn the suffix families
Suffixes encode the class: -statin (statins), -pril (ACE inhibitors), -sartan (ARBs), -olol (beta blockers), -prazole (PPIs), -floxacin (fluoroquinolones), -gliptin (DPP-4 inhibitors), -gliflozin (SGLT2 inhibitors). Suffix recognition rescues you when a specific drug is unfamiliar.
Know the exceptions
Not every drug wears its class on its sleeve. Carvedilol is a beta blocker without the -olol giveaway if you don't know it; metformin, warfarin, and clopidogrel each need to be memorized outright. Build a short list of the class members that break the suffix rules.
Drug Class Quiz: FAQ
Why does drug class matter on the PTCB exam?
Class tells you a drug's mechanism, its typical uses, and its safety profile in one step. Many Medications-domain questions are answerable purely from knowing the class, which makes classification a high-yield skill to drill.
Do I need to memorize every drug?
No. Learn the suffix patterns first, then memorize only the high-volume drugs that break those patterns. That covers the large majority of what the exam tests.
Official sources checked
This quiz's content and explanations are built from and cross-checked against primary sources. Verify current exam facts directly with PTCB.