Regulation & market
Investigational drug
Also known as: ind · investigational new drug
A compound under study in clinical trials but not yet approved for marketing.
In plain terms
An investigational drug may be genuinely promising and still fail. Roughly nine in ten drugs entering human trials never reach approval — most commonly for lack of efficacy or unacceptable toxicity discovered late.
Retatrutide is the clearest current example in this space: impressive trial data, and not an approved medicine.
Compounds where this comes up
Sources
Educational reference only. Pepperz does not provide medical advice, diagnosis, treatment, prescribing guidance, or dosing recommendations.