While discussing antihypertensives, the instructor states that a particular agent causes a reduction in blood pressure by blocking receptor sites. The student wishing to understand this statement would research which drug information?
Correct Answer: D
Rationale: Blocking receptor sites to lower blood pressure describes the drug's mechanism of action-how it works (e.g., beta-blockers on adrenergic receptors). Interactions detail combined effects. Adverse effects list risks. Indication states purpose (hypertension). Mechanism explains the receptor-blocking process, key to understanding the statement, aligning with pharmacology's focus on action.