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phase iv is a noun meaning "sometimes the FDA approves a drug for general use but requires the manufacturer to continue to monitor its effects; during this phase the drug may be tried on slightly different patient populations than those studied in earlier trials". It carries one recorded sense.
sometimes the FDA approves a drug for general use but requires the manufacturer to continue to monitor its effects; during this phase the drug may be tried on slightly different patient populations than those studied in earlier trials
Definitions, synonyms and semantic relations for phase iv come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.