Weight-loss medicines: forms, approval, and research status: October 2026

An oral medicine and an injectable medicine may contain related ingredients but have different product labels and instructions. Do not assume they can be swapped, taken on the same schedule, or compared by price alone. Check the exact brand, form, strength, approved use, and patient instructions in the current FDA record.

For a plain-language overview of the existing GLP-1 material on this site, see the linked explainer. Use the official FDA record for current product labeling.

Approval applies to a specific product and labeled use, not to every product that uses a familiar ingredient name. The FDA’s Drugs@FDA records include approval history and product labeling. Check the exact product before relying on a seller’s description.

A clinician may sometimes prescribe a medicine outside its FDA-approved label. That is a clinical decision for the prescriber and patient; this guide does not recommend a medicine or assess whether a particular prescription is appropriate.

NIDDK’s page, last reviewed in June 2024, lists these non-GLP-1 examples: orlistat (Xenical; it notes a lower-dose over-the-counter version, Alli), phentermine-topiramate (Qsymia), and naltrexone-bupropion (Contrave). This is an older snapshot, not a complete list of products, forms, or current approvals in 2026.

These medicines differ in label, form, use, and risks. Check the current FDA record for the exact product and discuss options with a health professional; this page does not rank medicines or recommend one for a reader.

The FDA says compounded drugs do not undergo its premarket review for safety, effectiveness, and quality. Its semaglutide safety notice describes reported dosing errors with compounded injectable products and says compounded drugs should be used only when an available FDA-approved drug cannot meet a patient’s medical need.

Compounding rules and product-specific circumstances are complex and can change. A research-use label, vendor certificate, or low price does not establish FDA approval for people. This guide does not direct readers to buy research-only products for human use.

ClinicalTrials.gov is a searchable registry, not a recommendation service. Search by medicine or condition, then use each record’s status, location, sponsor, and results fields to see what is listed. A listing is not proof that a study is recruiting or that a product is approved.

Open the individual record for its contact details and current status. The sponsor or investigator supplies the record, and the registry says its listing does not mean the government has approved the study’s safety or science. Ask a health professional about possible risks before considering participation.