Semaglutide is a man-made version of a hormone that our gut naturally releases after we eat, called GLP-1 (glucagon-like peptide-1). It belongs to a group of medicines called GLP-1 receptor agonists, mainly used to control blood sugar in type 2 diabetes and to help with weight loss. It is a prescription-only medicine; it cannot be bought without a doctor's prescription.

• Therapeutic Class: Anti-diabetic and anti-obesity medicine.

• Pharmacological Class: GLP-1 receptor agonist (incretin mimetic).

• Drug Family: Incretin-based therapies (same family as liraglutide, dulaglutide).

• ATC Classification: A10BJ06 (Semaglutide, blood glucose-lowering drug).

Approved: [Type 2 Diabetes] (blood sugar control), [Obesity and Overweight] (weight management), reducing cardiovascular risk (heart attack, stroke, cardiovascular death) in adults with established heart disease and overweight/obesity, and reducing the risk of worsening kidney disease in people with type 2 diabetes and [Chronic Kidney Disease].

Commonly used for: People with diabetes who are also overweight, and people who haven't managed to lose weight through diet and exercise alone.

Off-label use (only under medical guidance): Sometimes considered in PCOS-related weight gain and insulin resistance, though this is a doctor's decision, not routine use.

• Injection (pre-filled pen) for diabetes: Available in strengths including 0.25 mg, 0.5 mg, 0.75 mg, 1 mg, 1.7 mg, 2 mg, 2.4 mg, 4 mg, and 8 mg.

• Injection (pre-filled pen) for weight management: Available in strengths ranging from 0.25 mg to 2.4 mg.

• Oral tablet for diabetes: Available in 3 mg, 7 mg, and 14 mg.

• Oral tablet, for weight management: A newer, higher-strength tablet is also available.

Semaglutide copies a natural gut hormone called GLP-1. After you eat, it helps your pancreas release insulin when needed, stops your liver from adding extra sugar, and slows digestion so you feel full longer. Result: steadier blood sugar, less hunger, and gradual weight loss. 

• Standard starting dose: For the injection, treatment usually begins at 0.25 mg once weekly for the first 4 weeks. This starting dose is only to let the body adjust and isn't meant for blood sugar or weight control yet. The dose is then increased slowly every 4 weeks (0.25 mg → 0.5 mg → 1 mg → up to 2 mg for diabetes) to reduce stomach side effects. For the oral tablet, it usually starts at 3 mg once daily for 30 days, then increases to 7 mg, and if needed, to 14 mg once daily.

• Condition-wise dose: For type 2 diabetes, the injection is typically used at 1 mg or 2 mg once weekly, and the tablet at up to 14 mg once daily. For weight management, doses are usually higher; the injection is gradually increased to 2.4 mg once weekly, and a higher-strength 25 mg oral tablet is available for weight loss.

• Route: Subcutaneous injection (under the skin, in the abdomen/thigh/upper arm) once a week, OR an oral tablet once a day.

• Food instructions: Injection: no food restriction. Oral tablet: must be taken on an empty stomach, first thing in the morning, with a small sip of plain water, and no food/drink/other medicines for at least 30 minutes after.

• Missed dose: For the weekly injection, it can usually be taken within a few days of the missed dose (as per the product label); for the daily tablet, just skip the missed dose and continue the next day; don't double up.

• Overdose: Can cause severe nausea, vomiting, and very low blood sugar; needs urgent medical attention.

• Common: Nausea, vomiting, diarrhoea, constipation, reduced appetite, headache, and mild injection-site reactions.

• Serious: Pancreatitis (inflammation of the pancreas), gallbladder problems (gallstones), worsening kidney function, rapid heart rate.

• Emergency symptoms: Severe stomach pain that doesn't go away, swelling in the neck/difficulty swallowing (possible thyroid issue), signs of a serious allergic reaction (swelling of the face/throat, difficulty breathing), or symptoms of very low blood sugar (shakiness, confusion, cold sweat).

• Recovery advice: Most mild stomach-related side effects settle down as the body adjusts over the first few weeks; eating smaller, simpler meals can help.

• Pregnancy: Not recommended; should be stopped well before planning a pregnancy.

• Breastfeeding: Not recommended without medical advice.

• Liver disease: Used cautiously; monitored closely.

• Kidney disease: Used cautiously in reduced kidney function; can be considered under supervision in certain chronic kidney disease cases.

• Elderly: Generally used with caution, monitoring for dehydration due to stomach side effects.

• Children: Approved only for certain weight-management uses in select older children/teens (12+), only under specialist care; not used in young children.

Semaglutide can interact with a few other medicines, so it's important to tell your doctor about everything you're taking.

• Insulin or sulfonylureas: Taking these along with semaglutide increases the risk of low blood sugar (hypoglycemia). Your doctor may need to adjust the dose of these medicines, and you should monitor your blood sugar closely.

• Oral contraceptive pills: Semaglutide slows down stomach emptying slightly, which could affect how well the pill is absorbed. This is usually not a major concern, but it's worth mentioning to your doctor if you're on birth control pills.

• Warfarin (a blood thinner): Since semaglutide slows digestion, it may slightly affect how this medicine works in the body. If you're on warfarin, your doctor will likely monitor you more closely.

• Other GLP-1 receptor agonists: Semaglutide should never be combined with another medicine from the same class, as this doesn't add extra benefit and can increase the risk of side effects.

• Blood sugar levels (regular home/lab monitoring).

• HbA1c (every 3 months, standard diabetes monitoring).

• Kidney function tests.

• Liver function tests.

• Weight and BMI tracking.

• Thyroid symptom check (especially if there's a personal/family history of thyroid issues).

Similar GLP-1-based molecules that a doctor might consider instead: [Liraglutide], [Dulaglutide], [Tirzepatide] (a related but distinct dual-action molecule).

Often prescribed alongside: Metformin, basal insulin, and blood pressure or cholesterol medicines. Semaglutide should never be combined with another GLP-1 receptor agonist.

1. Type 2 Diabetes Medicines,

2. Weight Management Treatments,

3. GLP-1 Receptor Agonists.

1. Side Effects Of Semaglutide

2. Beyond Ozempic: New GLP-1 Alternatives Coming in 2026?

3. Semaglutide (Ozempic) Guide for Indian Patients: Uses, Side Effects, and FAQs

4. Semaglutide Diet Plan

5. Ozempic(semaglutide): Medical Benefits, Risks, and What Indian Patients Should Know

6. Tirzepatide vs Semaglutide India

7. Mounjaro Injection for Weight Loss

1. https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/213051s000lbl.pdf

2. https://www.medicines.org.uk/emc/product/11507/pil

The information on this page is for educational purposes only and is not a substitute for medical advice. Please consult your oncologist to know if this treatment is appropriate for your condition.