Clinically reviewed by Dr. Ponlawat Pitsuwan, Physician, Doctor Samui.
Last reviewed: October 2026
Semaglutide on Koh Samui costs broadly in line with Bangkok clinic prices once you factor in consultation and same-day dispensing. Ozempic starter doses typically run in the range of 3,500 to 5,500 THB per pen, and Wegovy sits higher. You need a Thai prescription regardless of what you bring from home. Doctor Samui provides in-person consultations and hotel or villa visits across the island, so you do not have to travel to the mainland to start or continue a programme.
You have been on Ozempic for four months at home. The programme is working, your dose is steady, and now you are spending six weeks at a villa in Bophut. The last thing you want is a two-week gap in treatment while you figure out whether you can get a prescription on the island. This is one of the most common situations we handle at our Chaweng clinic, and the answer is simpler than most people expect.
Semaglutide, the active ingredient in Ozempic and Wegovy, is available on Koh Samui through a licensed medical consultation. Prices are competitive with Bangkok when you account for the fact that you do not need to fly anywhere or take a day out of your trip. Below is what things actually cost here, how that compares to Bangkok and Phuket, and what to watch out for when prices look too low.

Semaglutide Price on Koh Samui vs Bangkok vs Phuket
Exact prices change, so figures that are outdated by the time you read this are not useful. What follows is a clear picture of the ranges and what drives the differences.
| Item | Koh Samui (Doctor Samui) | Bangkok (clinic average) | Phuket (clinic average) |
|---|---|---|---|
| Initial consultation | Included | 500–1,500 THB extra | 500–1,500 THB extra |
| Ozempic 0.25 mg / 0.5 mg starter pen | 3,500–5,500 THB | 3,500–5,500 THB | 3,800–5,800 THB |
| Ozempic 1 mg maintenance pen | 5,500–7,500 THB | 5,500–8,000 THB | 5,800–8,000 THB |
| Wegovy (2.4 mg, single pen) | Contact for current price | 9,000–14,000 THB | 9,500–14,000 THB |
| Hotel or villa visit | Available island-wide | Not available | Limited |
| Same-day dispensing | Yes | Yes (most clinics) | Yes (most clinics) |
These are representative ranges based on published and direct-inquiry pricing from clinics across all three locations. Phuket clinics tend to run slightly higher. Bangkok prices are competitive but do not include travel. For current Koh Samui pricing, see the Doctor Samui GLP-1 programme page or call ahead.
One key point: the consultation is not a formality. A doctor needs to check your blood pressure, review your medical history, and confirm there are no contraindications before your first dose. Doctor Samui includes this in the programme cost, which several Bangkok competitors do not.
Why Price Alone Is Not a Safe Guide on Koh Samui
This is the part worth reading before you buy anything. Semaglutide has a real cost of goods. Novo Nordisk, the manufacturer of Ozempic and Wegovy, supplies through a licensed cold chain. Below a certain price, a product simply cannot be genuine.
Grey-market GLP-1 products circulate in Thailand. Some are unlicensed compounded versions. Some are outright counterfeits. Independent testing of grey-market GLP-1 vials has found wrong doses, bacterial contamination, and in some cases no active drug at all. Pharmacy oversight on Koh Samui is less rigorous than in Bangkok, which makes this risk more relevant here, not less.
If someone is offering semaglutide well below the ranges in the table above, ask hard questions. Where did it come from? Is it dispensed under a Thai prescription by a licensed physician? Can they show you original manufacturer packaging with a traceable batch number? If any answer is unclear, walk away.
Compounded semaglutide sits in a legal grey zone in Thailand. It is not the same as the licensed product, and it is not currently approved by the Thai FDA for weight management. A licensed clinic will not dispense it.
Who Is a Candidate for Semaglutide on Koh Samui
The standard clinical criteria apply regardless of location. Most clinics follow these broadly: a BMI of 30 or above for weight management without diabetes, or a BMI of 27 or above alongside a weight-related condition such as high blood pressure, pre-diabetes, or raised cholesterol. For type 2 diabetes, the threshold differs.
There are contraindications. A personal or family history of a specific type of thyroid tumour rules semaglutide out. So does a history of pancreatitis, certain other medications, and pregnancy. This is exactly why a proper consultation matters, and why you cannot safely buy this drug over the counter.
Short-stay tourists thinking about starting for the first time should think carefully. You begin on a low starter dose and move up slowly over weeks. If you are only here for ten days, this is not the right setting to begin. For continuity patients or longer-stay visitors, it is straightforward.
Ozempic vs Wegovy vs Mounjaro — The Practical Differences
All three are used for weight management, but they are not interchangeable. Ozempic is licensed for type 2 diabetes and widely prescribed off-label for weight loss in Thailand. Wegovy is the same molecule at a higher maintenance dose and is licensed specifically for obesity. Mounjaro targets two different gut hormones and clinical data suggests it produces greater average weight loss than semaglutide, though it is a different drug entirely.
Availability on Koh Samui is the practical constraint. Ozempic is consistently available. Wegovy availability can be patchy due to supply. Mounjaro varies, so the honest answer is to contact Doctor Samui directly to confirm current stock before you plan around it.
Rybelsus is an oral semaglutide tablet. It is an option for people who cannot tolerate injections, though absorption is more variable and it needs to be taken in a specific way to work properly.
Storing Your Semaglutide Pen in a Koh Samui Hotel or Villa
Nobody talks about this enough, and it comes up at almost every consultation. An unopened pen must be stored in a refrigerator at 2 to 8 degrees Celsius. Once opened, Ozempic can sit at room temperature below 30 degrees for up to 56 days. Koh Samui ambient temperature regularly exceeds 30 degrees, especially indoors without air conditioning.
Use your hotel minibar or room fridge. If you are in a villa, confirm the fridge is reliable before you rely on it. Do not leave your pen in a beach bag, a hire car, or on a counter in a non-air-conditioned room. Power cuts happen on the island: if your fridge loses power for more than a few hours, do not assume the pen is still effective.
A degraded pen delivers less drug than you expect. You may not realise why your results have stalled until weeks have passed.
Already on Semaglutide at Home — How Continuity Works on Koh Samui
Bring a letter from your home doctor or a recent prescription. Bring any remaining supply. Come in to our Chaweng clinic or book a hotel visit, and we review what you have, confirm your current dose, and issue a local Thai prescription so you can continue without a gap.
Thai pharmacies cannot dispense semaglutide on a foreign prescription. The local prescription step is a legal requirement for dispensing here, not an obstacle. Most continuity patients are in and out in under an hour.
What the Doctor Samui Consultation Covers
A GLP-1 consultation at Doctor Samui covers your weight and BMI, blood pressure, current medications, relevant medical history, and contraindication screening. We discuss what to expect in the first few weeks: nausea is common early on, usually mild, and settles. We set a dose plan so you know exactly when and how to move up.
For patients who want ongoing monitoring, follow-up appointments are available at the clinic or as villa visits. You can see the full programme details at our GLP-1 weight management page.
If you are looking to start semaglutide on Koh Samui, continue a programme from home, or just want a clear answer on current pricing, Doctor Samui’s Chaweng clinic offers same-day walk-in consultations and 24/7 hotel and villa visits across the island. We stock licensed Ozempic and can check Wegovy and Mounjaro availability when you contact us. No need to travel to Bangkok or Phuket for a GLP-1 consultation.
FAQ
Dr. Ponlawat Pitsuwan
Physician, Doctor Samui
a walk-in clinic based in Chaweng, Koh Samui, with 24/7 hotel and villa visits across the island. He sees tourists, families, and long-stay expats for GLP-1 weight management consultations, continuity prescriptions, and doctor-supervised semaglutide programmes. His focus is straightforward, evidence-based care delivered in plain language.


