Goods Across Borders · Customs rule card
Melatonin → Thailand
Purpose: Traveling · Verified: 2026-07-25
Available OTC in Thai pharmacies
Details
Melatonin is available over-the-counter in Thai pharmacies. No import restrictions for personal quantities. Widely used and affordable in Thailand. Travelers should verify current regulations with the destination customs authority before departure. Rules change frequently and enforcement practices vary by port of entry and officer discretion. In the reverse direction (taking melatonin out of Thailand): allowed — Melatonin supplements may be exported from Thailand freely as a dietary supplement.
Quantity limit
Personal use
Legal reference
Thai FDA regulations
Leaving with this item
Melatonin supplements may be exported from Thailand freely as a dietary supplement.
Practical advice
Personal-quantity melatonin (OTC supplement) clears as routine in destinations where it is OTC. In prescription-only markets (e.g. UK, France, Germany), declare with prescription if asked.
Customs authority
Thai Customs Department · https://www.customs.go.th