Phase IV Trial

**Semantic type:** Research Activity

**Definition:** A randomized, controlled trial that is designed to evaluate the long-term safety and efficacy of a drug for a given indication. Often they are designed to study side effects that may have become apparent after the phase III study was completed.

**Synonyms:** - 4 - Clinical Trials, Phase IV - PHASE IV TRIAL - Phase 4 - Phase 4 Study - Phase IV Clinical Trials - Phase IV Study - Trial Phase 4 - phase 4 - phase IV trial