CNPR Study Guide 2026
Everything you need to pass the CNPR exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CNPR Exam Format at a Glance
📚 CNPR Topics to Study (71)
✍️ Sample CNPR Questions & Answers
1. A drug's 'therapeutic index' (TI) measures the relationship between:
The therapeutic index (TD50/ED50) compares the dose causing toxicity to the dose producing the desired effect; a narrow TI means little margin between effective and harmful doses.
2. In pharmacology, what does 'half-life' (t½) of a drug mean?
Half-life is the time required for the concentration of a drug in the bloodstream to decrease by half, which determines dosing intervals.
3. A new pharmaceutical rep receives a territory that has been vacant for six months. What should be their FIRST priority?
A territory audit provides the context needed to develop a strategic plan and avoid repeating past mistakes before investing time in physician calls.
4. Which organization publishes the Physicians' Desk Reference (PDR), a widely used compendium of drug prescribing information?
The PDR is published by PDR Network and compiles FDA-approved prescribing information (package inserts) from pharmaceutical manufacturers for use by healthcare professionals.
5. The requirement for pharmaceutical companies to submit 'Dear Healthcare Provider' (DHCP) letters is typically triggered by:
FDA may require or companies may issue DHCP letters to rapidly communicate important safety updates, label changes, or recall information to prescribers.
6. In managed care, rebates are typically paid by drug manufacturers to:
Manufacturers negotiate rebates paid to PBMs or health plans in return for favorable formulary status (preferred tier placement), which increases patient and prescriber access to their drug.