Every meaningful FDA action affecting GLP-1 medications.

The FDA outlined plans to restrict certain ingredients used in mass-marketed compounded GLP-1 medications and to step up enforcement against misleading advertising on direct-to-consumer telehealth platforms. The action follows a sustained pattern of patient adverse-event reports tied to non-FDA-approved formulations of semaglutide and tirzepatide sold by retail compounders.

The agency restated its longstanding position that compounded drugs do not undergo FDA premarket review for safety, effectiveness, or quality, and should be used only when medically necessary — preferably with prescriptions filled at state-licensed pharmacies rather than at compounding operations running at scale. FDA also flagged concerns specific to compounded GLP-1s, including improper cold-chain storage during shipping and inconsistent potency between batches when 503A pharmacies operate without rigorous third-party testing.

The FDA approved orforglipron under the brand name Foundayo on April 1, 2026 for adults with obesity, or adults with overweight and at least one weight-related health condition. Foundayo is the second oral GLP-1 approved for weight loss — following oral semaglutide (Wegovy) in December 2025 — and the first small-molecule, non-peptide oral GLP-1 receptor agonist approved by the agency. Unlike oral Wegovy, Foundayo can be taken at any time of day with no food or water restrictions.

Notably, the FDA reviewed the Foundayo application in 50 days under the Commissioner's National Priority Voucher pilot program. Typical new-drug approvals take six to ten months. Foundayo is the fifth approval issued under the CNPV pilot and the first approval of a new molecular entity under the program, making it the fastest NME approval since 2002.

In Lilly's ATTAIN-1 trial, patients on the highest dose who completed the trial lost an average of 27.3 lb (12.4% of body weight), versus 2.2 lb (0.9%) on placebo. Common side effects mirror other GLP-1s — nausea, constipation, diarrhea, vomiting, and reflux — and the label carries a class boxed warning for thyroid C-cell tumors. Self-pay through LillyDirect starts at $149/month for the lowest dose; eligible commercially-insured patients may pay as little as $25/month with the savings card.

Following a months-long review of the company's website between January and March 2026, the FDA determined that products sold by Gram Peptides — including substances marketed under labels such as "Retatrutide" (referred to internally as "GLP-1-R peptide"), "Tirzepatide" ("GLP-2 peptide"), and bacteriostatic water for injection — qualify as unapproved new drugs under section 505(a) of the Federal Food, Drug, and Cosmetic Act.

The warning is significant for the broader gray-market peptide trade. Vendors that sell GLP-1 analogs as "research use only" while clearly marketing them for human therapeutic use are now being targeted directly. The same legal theory threatens dozens of similar online sellers operating in this space.

The FDA approved a label expansion for Zepbound (tirzepatide) authorizing a four-dose, single-patient-use KwikPen that delivers a full month of treatment in one device for chronic weight management. Patients with a valid prescription opting for self-pay through LillyDirect can now receive tirzepatide in either the KwikPen or single-dose vial format starting at $299/month for the 2.5 mg dose; 5 mg through 15 mg doses are priced at higher tiers.

The therapeutic active ingredient is identical across Zepbound presentations — only the delivery vehicle changes. Lilly framed the multi-dose option as expanding flexibility for patients and clinicians to choose the format that fits individual needs.

On February 6, 2026, the FDA published a press announcement signaling formal enforcement action against non-FDA-approved GLP-1 drugs. The announcement clarified the agency's posture during the post-shortage period: while GLP-1 supply has stabilized, certain compounding pharmacies and gray-market vendors continue to distribute products that fall outside the legal compounding framework.

FDA paired the announcement with patient guidance recommending that compounded drugs be used only when medically necessary, and that patients fill prescriptions at state-licensed pharmacies rather than at large-scale compounding operations. The agency also pointed patients to the BeSafeRx campaign for guidance on safely buying prescription medications online.

In September 2023, the FDA moved a long list of peptides — including BPC-157, Thymosin Beta-4, CJC-1295, Ipamorelin, and Sermorelin — to Category 2 ("substances with safety concerns") on the 503A bulk drug substances list. That single regulatory action ended most legal bulk compounding of those peptides almost immediately.

Through 2025, industry groups, clinicians, and several state attorneys general formally asked HHS to reopen the review, citing what they described as inconsistent application of "safety concern" criteria across drug classes. New HHS leadership has since asked FDA to publish more data on how shortages are determined and to address access concerns; the 2026 budget request includes language directing FDA to publish more transparent shortage criteria.

FDA-approved prescribing information for both Zepbound (tirzepatide for weight loss) and Mounjaro (tirzepatide for type 2 diabetes) was updated in January 2026 to include multi-use vial presentations alongside the existing pen and single-dose vial formats. Each multi-use vial contains four weekly doses; patients draw up one dose each week using an insulin-style syringe — the same workflow used in many medical weight-loss programs.

The change formalizes a delivery format that compounded GLP-1 providers have used for years. For patients already comfortable with vial-format Zepbound, the official label change is a regulatory affirmation that this dosing method is now part of Lilly's long-term treatment model.

Following earlier label expansions for cardiovascular risk reduction (the SELECT trial) and other metabolic indications, Wegovy received an expanded FDA indication for metabolic dysfunction-associated steatohepatitis (MASH), the disease formerly known as NASH. MASH is a leading cause of liver transplantation in the U.S. and previously had no approved pharmacotherapy beyond resmetirom.

The MASH indication reflects a broader shift in how regulators view GLP-1 receptor agonists: not only as weight-loss agents, but as systemic metabolic therapeutics with measurable impact on cardiovascular outcomes, sleep apnea, kidney disease, and now liver pathology.

The FDA approved Zepbound (tirzepatide) for the treatment of moderate-to-severe obstructive sleep apnea in adults with obesity, alongside a reduced-calorie diet and increased physical activity. The approval was based on the phase 3 SURMOUNT-OSA trials, which evaluated 10 mg or 15 mg tirzepatide doses against placebo in patients with or without positive airway pressure (PAP) therapy.

The mechanism is indirect: weight loss reduces the airway obstruction that drives sleep apnea, and the effect sizes seen in SURMOUNT-OSA — meaningful reductions in hourly breathing disruptions and substantial weight loss across both PAP and non-PAP subgroups — were large enough to support the indication. Following approval, several major insurance carriers updated their formularies to cover tirzepatide for the OSA indication, typically requiring a documented diagnosis through a sleep study and a BMI of 30 or higher.

FDA confirmed in late 2024 that the tirzepatide shortage that began in 2022 had been resolved, with the manufacturer reporting that product availability and manufacturing capacity meet present and projected national demand. Enforcement discretion for compounders ended on the following published timeline:

• Tirzepatide: 503A pharmacies — February 18, 2025; 503B outsourcing facilities — March 19, 2025.
• Semaglutide: 503A pharmacies — April 22, 2025; 503B outsourcing facilities — May 22, 2025.

FDA reminded compounders that compounded drugs are not approved by the agency, do not undergo premarket review for safety, effectiveness, or quality, and may only be compounded under patient-specific clinical justification — not for mass distribution. Patients and prescribers may still see intermittent localized supply disruptions as products move through the supply chain, but the structural shortage is over.