A patient on two drugs that both depress bone marrow function is at increased risk for severe neutropenia. This is an example of which type of interaction?
Show answer and explanation
Correct answer: Additive pharmacodynamic
When two drugs produce similar adverse effects (bone marrow suppression), their effects add up, increasing risk of toxicity — a classic pharmacodynamic interaction.
Practice all 19 Adverse Drug Reactions and Interactions questions
Keep practicing
More Adverse Drug Reactions and Interactions questions
- What is the first step in evaluating a suspected adverse drug reaction in a patient?
- Which statement about drug–drug interactions is correct?
- Which of the following best describes a Type A adverse drug reaction (ADR)?
- Which is an example of a Type B (idiosyncratic) adverse drug reaction?
- A patient on warfarin starts a new drug that inhibits CYP2C9. What is the most likely consequence?
- Which mechanism underlies many serious drug–drug interactions (DDIs)?