Tendosin (naproxen)
Naproxen · Non-steroidal anti-inflammatory drug (NSAID)
Used for: Pain, inflammation and period pain.
Thai name: เทนโดซิน
- Available in Thailand
- YesTendosin is registered in Thailand
- Active ingredient
- NaproxenNon-steroidal anti-inflammatory drug (NSAID)
- 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 Tendosin?
Tendosin is a brand of naproxen sold in Thailand. Naproxen is a non-steroidal anti-inflammatory drug (NSAID) used for pain, inflammation and period pain. It is registered with the Thai FDA as compressed tablet, and the Thai licence holder is บริษัทวี.เอส.ฟาร์ม่า (1971). Brand names differ between countries, so outside Thailand ask for naproxen by name.
Is Tendosin available in Thailand?
Yes. Tendosin is registered with the Thai FDA. We found 1 active registration, held by บริษัทวี.เอส.ฟาร์ม่า (1971). 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: Tendosin
1 active registration on the Thai FDA medicine register. Select a registration number to open the official record.
Registrations
| Product | Form | Legal class | Registration no. |
|---|---|---|---|
| TENDOSINเทนโดซิน | compressed tablet | Pharmacist | 1A 885/41 |
Do I need a prescription for Tendosin in Thailand?
Not necessarily. Tendosin 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 Tendosin 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 Tendosin a narcotic or controlled substance in Thailand?
No. Tendosin (naproxen) 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 naproxen products in Thailand
These contain the same active ingredient as Tendosin. They are not necessarily interchangeable: strength, form and approved uses can differ, so talk to your doctor before switching.
Thai brand names for naproxen
- Anaproxen
- Annoxen-S
- Arthrolone
- Buproxen
- Naprofazt
- Naproflex
- Napronac
- Naprosian
- Naprosyn
- Naprox
- Naproxac
- Napxa
- Napxil
- Napxon
- Nasin
- Naxyn
- Neoflex
- Neoxen
- Poxenca
- Prodaril-N
- Proxen
- Sonap
- Soproxen
- Synflex
and 1 more.
See every naproxen product in Thailand → · Thai brand names A–Z
Sources
- Thai FDA medicine register (ระบบค้นหาข้อมูลผลิตภัณฑ์ยา), active-ingredient search for “Naproxen”, 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