system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which phase of clinical trials is done after the drug enters the market?
assistant
The correct answer is  Ans. (D) Phase IV(Ref: KDT 8th/e 91)Clinical TrialOther NamePhase 0Microdosing studiesPhase IHuman pharmacology and safetyPhase IITherapeutic exploratoryPhase IIITherapeutic confirmatoryPhase IVPost marketing surveillance