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Antidiabetic / GLP-1 receptor agonist

Semaglutide: uses, side effects & precautions

Also known as Ozempic, Rybelsus, Wegovy.

Diese Informationen dienen ausschließlich der allgemeinen Orientierung und stellen keine medizinische Beratung dar. Konsultieren Sie bei persönlichen gesundheitlichen Anliegen stets eine qualifizierte medizinische Fachkraft. Wählen Sie im Notfall Ihre örtliche Notrufnummer.

What it is used for

  • Type 2 diabetes (to improve blood sugar control)
  • Weight management in certain people (under a specific brand and on a doctor's advice)
  • Reducing cardiovascular risk in selected patients

How it works

Semaglutide acts like the natural gut hormone GLP-1: it helps the body release insulin after meals, lowers sugar made by the liver, slows stomach emptying, and reduces appetite, which lowers blood sugar and can support weight loss.

How it is taken

Available as a once-weekly injection under the skin using a pre-filled pen, and as a daily tablet (a separate brand) taken on an empty stomach as directed. Use it exactly as your doctor, pharmacist, or the label directs; for injections, rotate sites and never share pens or needles.

No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.

Common side effects

  • Nausea, especially early on
  • Vomiting or diarrhoea
  • Constipation
  • Reduced appetite
  • Burping or indigestion

Serious effects — get help

  • Severe, persistent stomach pain possibly spreading to the back (possible pancreatitis) — seek urgent care
  • Gallbladder problems (upper-right abdominal pain, fever, yellow skin) — seek care
  • Serious allergic reaction
  • A neck lump, swallowing difficulty, or persistent hoarseness (rare thyroid concern) — tell your doctor
  • Worsening of diabetic eye disease in some people — report sudden vision changes

If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.

Interactions to watch

  • Insulin and sulfonylureas (added low-blood-sugar risk)
  • Slowed stomach emptying can change absorption of some oral medicines
  • Alcohol (affects blood sugar)
  • Check all medicines with your pharmacist

Who should take care

  • Tell your doctor about any history of pancreatitis or medullary thyroid cancer / MEN 2
  • The oral form has specific timing rules (empty stomach, with little water) — follow the label exactly
  • Stay hydrated if you have vomiting or diarrhoea
  • Generally avoided in pregnancy and breastfeeding unless advised
  • Report severe abdominal pain or vision changes promptly

Frequently asked questions

Is Ozempic the same as Wegovy?
Both contain semaglutide but are different brands and uses — one is mainly for type 2 diabetes and another is licensed for weight management. Only use what your doctor prescribed for you.
Can I take it as a tablet instead of an injection?
There is a daily oral form, but it must be taken on an empty stomach with specific timing. Your doctor decides which form suits you.
Why does it cause nausea?
It slows stomach emptying and reduces appetite, which can cause nausea, especially when starting. This usually eases; tell your doctor if it is severe.
Does it cause low blood sugar?
On its own it rarely does; the risk rises if combined with insulin or a sulfonylurea.
Is Semaglutide safe to take?
For most people it is safe when taken exactly as a doctor or pharmacist advises and as printed on the label. Tell your clinician about your other medicines and health conditions, and seek urgent care for any serious reaction.

Related conditions

Related medicines

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