PHASE IV

Pronunciation (US):

(GB):

 Dictionary entry overview: What does phase IV mean? 

• PHASE IV (noun)
  The noun PHASE IV has 1 sense:

1. 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

  Familiarity information: PHASE IV used as a noun is very rare.

 Dictionary entry details 

• PHASE IV (noun)

Sense 1

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

Classified under:

Nouns denoting acts or actions

Synonyms:

phase IV; phase IV clinical trial

Hypernyms ("phase IV" is a kind 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)

 Context examples 

Thousands of people are involved in a phase IV trial.

(phase IV trial, NCI Dictionary)

After a treatment has been approved and is being marketed, it is studied in a phase IV trial to evaluate side effects that were not apparent in the phase III trial.

(phase IV trial, NCI Dictionary)