- Available in Thailand
- YesSaizen is registered in Thailand
- Active ingredient
- SomatropinHuman growth hormone (HGH)
- Prescription
- Pharmacist only (no prescription needed)
- Controlled substance
- NoNot narcotic or psychotropic
- Bringing it in
- AllowedTraveller rules
Source: Thai FDA official records · Last checked
What is Saizen?
Saizen is a brand of somatropin sold in Thailand. Somatropin is a human growth hormone (HGH) used for growth hormone deficiency. It is registered with the Thai FDA in 6 mg, 12 mg, 20 mg as solution for injection, and the Thai licence holder is บริษัท เมอร์ค จำกัด. Brand names differ between countries, so outside Thailand ask for somatropin by name.
Is Saizen available in Thailand?
Yes. Saizen is registered with the Thai FDA. We found 3 active registrations (6 mg, 12 mg, 20 mg), held by บริษัท เมอร์ค จำกัด. Registration means the product is licensed for sale in Thailand. It does not guarantee that a particular pharmacy has it in stock.
Thai FDA registered products: Saizen
3 active registrations on the Thai FDA medicine register. Select a registration number to open the official record.
Registrations
| Product | Form | Legal class | Registration no. |
|---|---|---|---|
| SAIZEN LIQUID 6 MG (5.83 MG/ML)- | solution for injection | Pharmacist | 1C 9/58 (NB) |
| SAIZEN LIQUID 12 MG (8 MG/ML)- | solution for injection | Pharmacist | 1C 10/58 (NB) |
| SAIZEN LIQUID 20 MG (8 MG/ML)- | solution for injection | Pharmacist | 1C 11/58 (NB) |
Do I need a prescription for Saizen in Thailand?
Not necessarily. Saizen is classed as a dangerous drug (ยาอันตราย) under the Thai Drugs Act. This means it must be sold by a pharmacist in a licensed pharmacy, but a doctor’s prescription is not legally required.
Can I bring Saizen into Thailand?
Allowed
Allowed for personal use: up to 30 days’ supply
- Bring no more than 30 days’ supply for your own use.
- Keep it in the original container.
- Carry your prescription or a doctor’s letter.
- Medicines cannot be posted or shipped to you in Thailand. The 30-day allowance applies to medicines you carry.
Legal basis: Drugs Act B.E. 2510 (1967), section 13(4). Thai FDA: FAQs on medicines (Drugs Act B.E. 2510, s.13(4))
Is Saizen a narcotic or controlled substance in Thailand?
No. Saizen (somatropin) is not a narcotic or psychotropic substance in Thailand. On the Thai FDA list it appears in the “others” group. The ordinary medicine rules apply.
Other somatropin products in Thailand
These contain the same active ingredient as Saizen. They are not necessarily interchangeable: strength, form and approved uses can differ, so talk to your doctor before switching.
Thai brand names for somatropin
See every somatropin product in Thailand → · Thai brand names A–Z
Sources
- Thai FDA medicine register (ระบบค้นหาข้อมูลผลิตภัณฑ์ยา), active-ingredient search for “Somatropin”, retrieved 8 October 2026
- Thai FDA Narcotics Control Division, Permit for Traveller: drug list, retrieved 30 September 2026
- Thai FDA: FAQs on medicines (Drugs Act B.E. 2510, s.13(4))
Registration numbers link to the Thai FDA’s public record for each product. Spotted something out of date? Report a correction.
General information only, not medical or legal advice. Rules change, so confirm with the Thai FDA or a pharmacist before you buy, take or travel with a medicine. Medical disclaimer