Phase 4 clinical trial also called as: (A) Therapeutic confirmation, (B) Post marketing surveillance, (C) Therapeutic exploration and dose ranging, (D) Human pharmacology and safety
Answer is B. Phase IV: Postmarketing surveillance/ studies After the drug has been marketed for general use, practicing physicians are identified through whom data are collected on a structured proforma about the efficacy, acceptability and adverse effects of the drug. Uncommon/idiosyncratic adverse effects, or those that occur only after long-term use and unsuspected drug interactions are detected at this stage. Ref:- kd tripathi; pg num:-80