What Is in Semaglutide? Ingredients by Brand & Formulation

There is no single ingredient list for every product called “semaglutide.” The active drug may be the same while the other ingredients differ between a tablet, a single-dose injection and a multidose pen. Start with the full product name and presentation on the carton, not a generic ingredient list copied from a seller.

The table below summarizes current U.S. manufacturer labeling checked October 15, 2026. It describes listed formulations, not a guarantee that every approved presentation is currently stocked. For a personal allergy or intolerance question, have the pharmacist check the label for the exact dispensed product.

Active drug versus the rest of the formulation

The active ingredient is semaglutide, a GLP-1 receptor agonist. Inactive ingredients are the other listed formulation components. “Inactive” does not mean irrelevant to a particular patient's allergy assessment or that all products use the same components^1,2,3.

Do not assume that an unfamiliar chemical name means an ingredient is unsafe, or that a short list means a product is right for you. The practical question is whether your prescriber and pharmacist can identify a concern with that exact formulation. Our Ozempic-versus-Wegovy guide explains why the brand products also differ in use and dosing.

The label's ingredient lists, by presentation

The injection descriptions also list hydrochloric acid or sodium hydroxide as possible pH adjusters. These rows come from the products' description sections; the full label remains the reference for your prescription^1,2,3. The table is not a mixing formula and omits manufacturing quantities deliberately.

The distinction within a brand matters. An ingredient list for an Ozempic multidose pen should not automatically be applied to a prefilled syringe. Likewise, the Wegovy FlexTouch list differs from the single-dose automatic pen's list. For identifying those devices, see how to inject Wegovy.

Why the pills include SNAC

SNAC stands for salcaprozate sodium and serves as an absorption enhancer in the oral formulation¹. It does not turn a swallowed tablet into the same delivery system as an injection. A product's semaglutide milligram number cannot be used to substitute one formulation for another independently.

The current Rybelsus/Ozempic tablet label distinguishes its products and warns against milligram-for-milligram substitution³. If packaging or formulation wording changed at a refill, ask the pharmacist what was dispensed. Our oral morning-routine guide covers the separate food, water and other-medication instructions; ingredient recognition does not replace those directions.

What if you suspect an allergic reaction?

Tell the clinician which product you used, when symptoms began and what happened. Bring the carton or a photograph of its label, including the presentation and lot information. Do not diagnose the responsible ingredient from a name alone or test a different formulation at home to see whether a reaction returns.

Wegovy labeling includes serious hypersensitivity reactions and contraindicates use with a known hypersensitivity to semaglutide or its excipients¹. Seek emergency care for severe symptoms such as trouble breathing or swelling of the face, tongue or throat. A clinician can distinguish an urgent reaction from other adverse effects and determine the next treatment step.

A compounded vial needs its own answer

Do not assign a brand ingredient list to a compounded prescription. Ask the dispensing pharmacy for the complete formulation, concentration, storage instructions and any added ingredients. Our semaglutide-with-B12 guide addresses one type of blend; color alone cannot verify its contents, strength or quality.

FDA distinguishes semaglutide sodium and semaglutide acetate from the active ingredient in approved drugs and states that it is unaware of a lawful basis for using those salts in compounding. Compounded drugs are not FDA-approved⁴. A label containing “sodium” as part of an inactive ingredient's name is not, by itself, evidence that the active ingredient is semaglutide sodium; have the pharmacist identify each component.

Use brand-versus-compounded guidance for that treatment distinction and mg-versus-units guidance for measurement questions. Neither an ingredient list nor a clear-looking vial establishes that a product can be substituted or a dose recalculated at home.