Tirzepatide in Thailand exists in two completely separate forms, and most of the confusion online comes from mixing them up. One is the approved medicine, sold under the Mounjaro name through hospitals and licensed pharmacies with a prescription. The other is tirzepatide as a research compound: the same peptide, supplied as a lyophilised powder in a vial, for laboratory use. This page explains the difference, where each one is available, what each costs, and why researchers in Thailand usually work with the vial.

Reta Bangkok supplies tirzepatide strictly for laboratory research. Nothing on this page is medical advice.

What tirzepatide is

Tirzepatide is a 39 amino acid synthetic peptide built on the GIP sequence and modified so it also activates the GLP-1 receptor. A C20 fatty diacid chain gives it a half life of about five days, which is why it is administered weekly. It was the first dual incretin agonist to reach the market, approved in the United States in 2022, and its Phase 3 programme, SURPASS for diabetes and SURMOUNT for obesity, is one of the largest in the field. In SURMOUNT-1, participants on the highest amount lost a mean of 20.9 percent of body weight over 72 weeks. For the receptor detail and how it compares with the triple agonist, see retatrutide vs tirzepatide.

The approved medicine in Thailand

Branded tirzepatide reached Thailand after its approvals in the United States and Europe, and it is now offered through the major private hospital groups in Bangkok, Chiang Mai, Phuket and Pattaya. The route is a consultation, a prescription, and a monthly supply of prefilled pens in the fixed amounts the manufacturer produces. Pricing is set by each hospital, the pen comes in fixed amounts, and the monthly cost rises as the amount steps up.

For anyone who wants a registered medicine with a doctor attached, that is the route, and it is the only route that gives you a product the Thai FDA has reviewed. Nothing in this article is a substitute for it.

Research grade tirzepatide in Thailand

Research tirzepatide is the same peptide sequence supplied as a freeze dried powder in a sealed vial, without a brand, a pen or a prescription. It is sold for laboratory use, and the serious suppliers label it that way, test every batch through an independent lab and publish the certificate of analysis. Researchers in Thailand work with the vial for three reasons.

• Flexibility. A vial can be reconstituted to any concentration, so a protocol is not limited to the four or five fixed amounts a pen comes in.
• Cost per milligram. A research vial contains far more peptide per baht than a branded pen, because there is no brand, no device and no hospital margin in the price.
• Availability. No consultation, no waiting list, and delivery within the day in Bangkok.

What research tirzepatide costs in Thailand

Vial	Price	Per mg
Tirzepatide 10 mg	฿2,400	฿240
Tirzepatide 30 mg	฿5,200	฿173

Bulk pricing applies on top: three vials of the same product take 10 percent off, five take 12 percent and ten take 15 percent. Wise and crypto payments take a further 5 and 10 percent at checkout. For most research protocols the 30 mg vial is the sensible size, since the per milligram price is 28 percent lower and one vial covers several weeks of work.

How to tell a tested vial from a repackaged one

Tirzepatide is the most counterfeited peptide in Asia because demand for it is enormous. The checks are the same as for any research compound: a lyophilised powder rather than a liquid, a crimped cap over an intact stopper, a printed label with the compound, the amount and a batch number, a certificate of analysis for that batch showing purity of 98 percent or above, and a way to verify the batch yourself. A seller who offers tirzepatide at half the tested price, in a vial with a hand written label, is selling you the price. Our buying guide goes through each check in detail.

Handling and storage

Identical to retatrutide. The sealed vial is stable at room temperature for the length of a delivery and for a year or more refrigerated at 2 to 8 °C. Reconstitute with bacteriostatic water added slowly down the glass, swirl rather than shake, and refrigerate the solution, which then keeps for about four weeks. The reconstitution guide applies step for step, and the calculator handles the concentration arithmetic for either vial size.

Tirzepatide and retatrutide together

A common research question is how the dual agonist compares with the triple agonist under the same conditions, which is why many researchers order both. Tirzepatide is the reference compound: thoroughly characterised, enormous data set, reproducible results. Retatrutide is the newer compound with the larger Phase 2 effect and the glucagon receptor component that tirzepatide lacks. We stock both, along with a retatrutide and cagrilintide blend for work on the amylin pathway. Our summary of the retatrutide trials sets out the published figures side by side.

Tirzepatide from Reta Bangkok

We stock tirzepatide in 10 mg and 30 mg vials, alongside retatrutide from 10 mg to 60 mg and bacteriostatic water. An independent lab tests every batch and the certificate of analysis is on the product page, with a QR code on each vial for batch verification. Orders before 3 pm go out the same day in Bangkok, one to three days across Thailand. For wholesale, contact us.

All products on Reta Bangkok are for laboratory research use only, not for human or veterinary use.