OPRA: Pharmacology & toxicology
Pharmacology and toxicology is about ~15% of OPRA — mechanism-driven content that rewards understanding over memorising.
High-yield areas
- Autonomic pharmacology & receptor theory
- CYP450 inhibitors/inducers and clinically important interactions
- Adverse drug reactions and key drug toxicities
- Toxicology: the high-yield poison–antidote pairs
How to study it
Learn the mechanism first, then the drugs fall out of it. Our Crash Course teaches the underlying logic (e.g. transmitter → receptor → effect) before testing it.
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Start freeFrequently asked questions
How much of OPRA is pharmacology?
Pharmacology and toxicology is approximately 15% of the exam.