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Pronunciation varies by accent · adjective
Of, or relating to investigating, or to an investigation..
An expanded access protocol allows patients to benefit from an investigational drug prior to FDA approval.
Use investigational when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Investigational means Of, or relating to investigating, or to an investigation..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
An expanded access protocol allows patients to benefit from an investigational drug prior to FDA approval.
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