What is Rybelsus? The semaglutide tablet explained

Rybelsus is a once-daily tablet of semaglutide, a diabetes medicine made by Novo Nordisk. It is licensed for adults with type 2 diabetes, alongside diet and exercise, to lower blood sugar. In the US it is also licensed to reduce the risk of heart attack, stroke and death from cardiovascular disease in adults with type 2 diabetes who are at high risk of these events.¹² It is not licensed for weight loss: no regulator, including the FDA, the EMA and the MHRA, lists weight management as one of its uses.¹³² Since May 2026 the newer Rybelsus tablets have been sold in the US under a different name, Ozempic tablets.⁵

How does Rybelsus work?

Rybelsus contains semaglutide, which belongs to a group of medicines called GLP-1 receptor agonists. GLP-1 (glucagon-like peptide-1) is a hormone your gut releases after you eat. Semaglutide is a modified version of it: the order of its building blocks is 94% similar to the natural human hormone.¹

In plain English, the US prescribing information describes three effects:¹

• it makes the pancreas release more insulin, the hormone that moves sugar out of the blood and into the body's cells;
• it makes the pancreas release less glucagon, a hormone that raises blood sugar;
• it slightly slows how fast the stomach empties after a meal.

Together these lower blood sugar. The insulin and glucagon effects only happen when blood sugar is raised, so on its own semaglutide carries a low risk of hypoglycaemia (blood sugar that falls too low). That risk rises when it is combined with insulin or with a sulfonylurea, a type of tablet that pushes the pancreas to release insulin, and the prescriber may lower the dose of those medicines.¹²

The NHS adds that semaglutide reduces appetite and helps you feel full for longer, which is why weight often falls.⁴ It is also long-acting. Its half-life (the time it takes for the amount in the blood to halve) is about one week. It takes 4 to 5 weeks of daily tablets to reach steady levels, and semaglutide stays in the blood for about five weeks after the last dose.¹

How can a protein medicine work as a tablet?

Semaglutide is a peptide, a small protein, and enzymes in the stomach would normally break it down before it could be absorbed. Each Rybelsus tablet therefore contains an absorption enhancer called salcaprozate sodium, or SNAC.¹¹²

Research by Novo Nordisk scientists found that semaglutide from the tablet is absorbed in the stomach itself, close to the surface of the tablet. SNAC briefly buffers the stomach environment around the tablet, which protects semaglutide from enzymes, and helps it pass through the stomach lining.¹² Even so, only a small fraction of each dose reaches the bloodstream: about 0.4% to 1% for the original 3, 7 and 14 mg tablets and about 1% to 2% for the newer 1.5, 4 and 9 mg tablets.¹

Food, drinks and extra water all reduce that small share. That is why Rybelsus comes with strict rules: an empty stomach, a small sip of water and a wait of at least 30 minutes before eating, drinking or taking other tablets.¹² Our guide on how to take Rybelsus sets out the exact wording in each region.

Not every GLP-1 tablet works this way. Foundayo (orforglipron), a tablet from Eli Lilly approved in the US in 2026, is a small non-peptide molecule, so it needs no absorption enhancer.¹⁶

Who is Rybelsus licensed for?

A medicine's licence lists the uses, or indications, that regulators have approved. For Rybelsus they differ slightly by region.

• US (FDA prescribing information, revised January 2026): to improve blood sugar control in adults with type 2 diabetes, alongside diet and exercise; and to reduce the risk of major adverse cardiovascular events (cardiovascular death, non-fatal heart attack or non-fatal stroke) in adults with type 2 diabetes who are at high risk of these events.¹ The FDA added the cardiovascular use on 17 October 2025.⁶⁹
• EU (EMA product information): adults whose type 2 diabetes is not well controlled, alongside diet and exercise, either on its own when metformin is considered inappropriate or together with other diabetes medicines.³
• UK (the MHRA-approved Summary of Product Characteristics, or SmPC): the same as the EU, with use on its own when metformin is inappropriate "due to intolerance or contraindications".²

The US cardiovascular indication rests on the SOUL trial. It followed 9,650 adults aged 50 or over with type 2 diabetes and atherosclerotic cardiovascular disease (narrowed, damaged arteries), chronic kidney disease or both, for an average of 47.5 months. A major cardiovascular event happened to 12.0% of people on oral semaglutide and 13.8% on placebo, a 14% relative reduction (hazard ratio 0.86).¹⁰ In the EU and UK the SOUL results were added to the product information, but no separate cardiovascular indication was granted.¹¹²

In every region Rybelsus is for adults only, because safety and effectiveness have not been established under 18. The UK SmPC also says it should not be used in type 1 diabetes or to treat diabetic ketoacidosis, a dangerous build-up of acids in the blood.¹²

What Rybelsus is not licensed for

Rybelsus is not a weight-loss pill. Weight loss was a secondary effect seen in the diabetes trials, not a licensed use.¹³² In the placebo-controlled trials in the US label, average weight loss with 7 mg and 14 mg over 26 weeks ranged from about 2.3 to 4.4 kg, compared with 0.4 to 1.4 kg on placebo.¹

Novo Nordisk makes a separate oral semaglutide product for weight management, the Wegovy pill, which has a 25 mg maintenance dose and its own trials in people without diabetes.¹³ Using Rybelsus purely for weight loss would be off-label, meaning outside its licence, and that is a decision only a prescriber can make. Our guide to Rybelsus and weight loss sets out the trial numbers and the medicines that are licensed for weight management.

Rybelsus tablet vs Ozempic injection

Rybelsus and the Ozempic injection contain the same medicine, semaglutide, and both are licensed for type 2 diabetes. The practical differences are large:

The two are not interchangeable dose for dose. The UK SmPC says semaglutide levels after 9 mg tablets daily are comparable to 0.5 mg injected weekly, but no tablet dose equivalent to the 1 mg injection has been established.² Switching between them is a prescriber's decision. The dosage guide sets out what each label says, and Rybelsus vs Ozempic compares the evidence.

When was Rybelsus first approved?

• US: the FDA approved Rybelsus 3, 7 and 14 mg on 20 September 2019 (NDA 213051).⁶ Novo Nordisk describes this as the first approval of semaglutide in pill form for type 2 diabetes.⁵
• EU: the European Commission authorised Rybelsus on 3 April 2020.⁷ The newer 1.5, 4 and 9 mg tablets were added on 1 August 2024, and 25 and 50 mg tablets on 19 September 2024.³¹¹
• UK: the EU authorisation applied in the UK during the Brexit transition period. The current UK licences, for 1.5, 4 and 9 mg tablets, were first authorised on 6 December 2024, and the old 3, 7 and 14 mg tablets are now listed as discontinued.²⁸

The newer tablets carry lower numbers because more semaglutide is absorbed from them. The doses match: 1.5 mg is equivalent to 3 mg, 4 mg to 7 mg and 9 mg to 14 mg, and it is always one tablet a day.¹⁸

Why Rybelsus is called the Ozempic pill in the US

On 30 January 2026 the FDA approved a change of name for the newer US tablets, from Rybelsus to Ozempic (semaglutide) tablets.¹⁴ Ozempic tablets 1.5, 4 and 9 mg went on sale on 4 May 2026.⁵ They contain the same medicine, with the same licensed uses and the same rules for taking it; what changed is the name, the dose numbers and the tablet shape.¹ Novo Nordisk says Rybelsus continues to be marketed outside the US.⁵

In the US, an Illinois Medicaid notice says shipments of Rybelsus tablets to wholesalers stopped in May 2026, and that patients will not be converted automatically: a new prescription is required.¹⁷ If you take Rybelsus in the US, confirm with your prescriber or pharmacist how the switch will be handled. Our guide to the Ozempic pill explains the timeline, how the doses map and what the change means if you took Rybelsus in the US.

Names, strengths, prescription rules and prices differ from country to country. If your country is not shown above, you can choose it from the full list.