a research trial that is exploring an unapproved drug or treatment

जांचात्मक अध्ययन

English Usage: The investigational study showed promising results for the new medication.

Hindi Usage: जांचात्मक अध्ययन ने नई दवा के लिए आशाजनक परिणाम दिखाए।

a drug that is being tested for safety and effectiveness in clinical trials

जांचात्मक दवा

English Usage: The investigational drug was administered to participants during the trial.

Hindi Usage: जांचात्मक दवा का परीक्षण के दौरान प्रतिभागियों को दिया गया।