investigational ( synonym found)

Definition of investigational:

(adj) : of, or relating to investigating, or to an investigation; of, or relating to an unapproved drug or chemical entity being studied
"an expanded access protocol allows patients to benefit from an investigational drug prior to FDA approval."

Definition of investigational:

(adj) : of, or relating to investigating, or to an investigation; of, or relating to an unapproved drug or chemical entity being studied
"an expanded access protocol allows patients to benefit from an investigational drug prior to FDA approval."

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