GLP-1 stands for glucagon-like peptide-1, a hormone your gut releases naturally after you eat. It’s part of how your body signals fullness, slows digestion, and regulates blood sugar. Medications like semaglutide and tirzepatide work by mimicking or amplifying that signal.
What semaglutide does
Semaglutide is a GLP-1 receptor agonist — it binds to the same receptors your natural GLP-1 hormone would, but stays active in the body much longer, which is why it’s dosed weekly rather than with every meal. It’s the active ingredient behind two FDA-approved products: Ozempic®, approved for type 2 diabetes management, and Wegovy®, approved specifically for chronic weight management in adults with obesity or overweight plus a weight-related condition. An oral version, Rybelsus®, delivers the same active ingredient as a daily tablet instead of an injection.
What tirzepatide adds
Tirzepatide works on two receptor pathways instead of one — both GIP (glucose-dependent insulinotropic polypeptide) and GLP-1. That dual mechanism is what distinguishes it from single-target GLP-1 medications. It’s the active ingredient in Mounjaro® (approved for type 2 diabetes) and Zepbound® (approved for chronic weight management and, more recently, moderate to severe obstructive sleep apnea in adults with obesity).
Why this isn’t a “just take a pill” story
Both drug classes carry a boxed warning about thyroid C-cell tumors observed in rodent studies, and both are contraindicated for anyone with a personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2). Common side effects include nausea, diarrhea, vomiting, and injection-site reactions, and more serious risks — including pancreatitis, gallbladder disease, and kidney injury — are documented in the prescribing information for both drug classes.
That’s the real reason a licensed physician evaluation comes before any prescription in our clinic, not after: these are effective medications with a real risk profile, not a supplement you self-select.
Where this fits into treatment
If you’re evaluated as a candidate, your physician decides which medication — and which form, injectable or oral — fits your health history and goals. Nothing here should be read as a guarantee of eligibility or results; that determination happens in person, not on this page.
Sources: FDA prescribing information — Ozempic (semaglutide) · FDA prescribing information — Wegovy (semaglutide) · FDA prescribing information — Zepbound (tirzepatide)
This article is for informational purposes only and is not medical advice. Read our Medical Disclaimer.