retatrutide stacked with tirzepatide vs — What to Know Before You Decide Retatrutide vs Tirzepatide: GLP-1, GIP

Common Drug Interactions with GLP-1s Prescriptions to monitor include: Thyroid meds (like levothyroxine): delayed absorption = wonky labs Oral birth control : less reliable if not absorbed well (oops!) SSRIs/SNRIs : altered absorption can lead to mood changes Fat-soluble vitamins (A, D, E, K) : need bile flow and good digestion Iron/B12 : absorption requires stomach acid, which may be reduced PPIs (Prilosec, Nexium) : when combined with GLP-1s, can severely limit nutrient uptake Over-the-Counter Medications to Watch Even common OTC meds can cause problems when combined with GLP-1s

doi: 10.1056/NEJMoa1208799

If you've been on semaglutide for many months and have plateaued despite dose optimization, tirzepatidewhich targets both GLP-1 and glucose-dependent insulinotropic polypeptide (GIP) receptorsmay provide additional benefit

Learn evidence-based timing, portion control advice, and how GLP-1 supports sustained weight loss after surgery

But none had been isolated with incretin-like properties first described by La Barre which was considered to be ideal for the treatment of type 2 diabetes (Marks Samols