phase II

Definitions of phase II
  1. noun
    a clinical trial on more persons than in phase I; intended to evaluate the efficacy of a treatment for the condition it is intended to treat; possible side effects are monitored
    synonyms: phase II clinical trial
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    type of:
    clinical test, clinical trial
    a rigorously controlled test of a new drug or a new invasive medical device on human subjects; in the United States it is conducted under the direction of the FDA before being made available for general clinical use
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