WASHINGTON, March 12 (Reuters) - Compounded weight-loss drugs that contain vitamin B12 and the main ingredient in Eli Lilly's ...

Lilly is warning the public that tirzepatide mixed with B12 is creating an impurity with “unknown effects” in humans.

Though it’s hard to say exactly what the future holds for mass GLP-1 compounding, the pressure is mounting from multiple angles in the U.S. | Eli Lilly—which has already staged multiple efforts in ...

Eli Lilly & Co. warned that the active ingredient in its weight-loss blockbuster Zepbound could pose a risk to patients when ...

Combining tirzepatide with vitamin B12, a common additive in compounded versions of the drug, yields an impurity that could alter the drug’s toxicity profile and pose safety risks to patients, the ...

The FDA is taking no prisoners as it continues its efforts to combat widespread GLP-1 drug compounding. | In the letters sent ...

Eli Lilly and Co LLY on Thursday issued a public warning about potential safety risks linked to compounded tirzepatide ...

March 4, 2026 - The U.S. Food and Drug Administration on Tuesday announced the issuance of 30 warning letters to telehealth companies for making false or misleading claims regarding compounded GLP-1 ...

Testing identified significant impurity formation when tirzepatide is compounded with B12 variants, suggesting chemical incompatibility that is not evaluated under FDA review pathways. Uncertainty ...

Telehealth company Hims & Hers on Monday announced a “strategic shift” in its business model, partnering with pharmaceutical company Novo Nordisk to sell its blockbuster GLP-1 medication and stop ...

Compounded GLP-1s for Weight Loss: What Are They and Are They Safe? GLP-1s (glucagon-like peptide-1 receptor agonists) are medications used to treat type 2 diabetes and obesity. You’ve probably heard ...