Definitions for "Phase IIb"
Keywords:  dosage, efficacy, iii, clinical, trial
a clinical trial involving the administration of a drug to human patients in which the primary objective is to establish the appropriate therapeutic dose for the drug
A late Phase II clinical trial involving patients which usually aims to provide preliminary evidence of efficacy and often includes different dosage regimens
Phase II clinical trials undertaken prior to Phase III clinical trials usually involving varying levels of dosage