Myfenax (diclofenac)
Diclofenac · Non-steroidal anti-inflammatory drug (NSAID)
Used for: Pain and inflammation, including arthritis.
Thai name: มายฟีแนกซ์
- Available in Thailand
- YesMyfenax is registered in Thailand
- Active ingredient
- DiclofenacNon-steroidal anti-inflammatory drug (NSAID)
- Prescription
- Available without prescription
- Controlled substance
- NoNot narcotic or psychotropic
- Bringing it in
- AllowedTraveller rules
Source: Thai FDA official records · Last checked
What is Myfenax?
Myfenax is a brand of diclofenac sold in Thailand. Diclofenac is a non-steroidal anti-inflammatory drug (NSAID) used for pain and inflammation, including arthritis. It is registered with the Thai FDA as gel, and the Thai licence holder is บริษัท โรงงานเภสัชกรรม เกร๊ทเตอร์ฟาร์ม่า จำกัด. Brand names differ between countries, so outside Thailand ask for diclofenac by name.
Is Myfenax available in Thailand?
Yes. Myfenax is registered with the Thai FDA. We found 1 active registration, held by บริษัท โรงงานเภสัชกรรม เกร๊ทเตอร์ฟาร์ม่า 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: Myfenax
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. |
|---|---|---|---|
| MYFENAX GELมายฟีแนกซ์ เจล | gel | General sale | 1A 494/56 |
Do I need a prescription for Myfenax in Thailand?
No. Myfenax is not a dangerous or specially controlled drug in Thailand, so it can be sold without a prescription.
Can I bring Myfenax 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 Myfenax a narcotic or controlled substance in Thailand?
No. Myfenax (diclofenac) 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 diclofenac products in Thailand
These contain the same active ingredient as Myfenax. They are not necessarily interchangeable: strength, form and approved uses can differ, so talk to your doctor before switching.
Thai brand names for diclofenac
- Almiral
- Amminac
- Antenac
- Arclonac
- Bufenac
- Canfenac
- Cataflam
- Catanac
- Chai-Fenac
- Clofec
- Clonac
- Coolnac
- Covonac
- Denac
- Diclo
- Diclogel
- Diclogesic
- Diclonac
- Diclosian
- Diclotroy
- Diconac
- Difazt
- Difelene
- Difenac
and 71 more.
See every diclofenac product in Thailand → · Thai brand names A–Z
Sources
- Thai FDA medicine register (ระบบค้นหาข้อมูลผลิตภัณฑ์ยา), active-ingredient search for “Diclofenac”, 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