Can you bring Cetirizine (Zyrtec, Reactine) to Thailand?
You can bring a normal personal supply of cetirizine (Zyrtec) without paperwork, but not Zyrtec-D, which contains pseudoephedrine. It is easy to buy from Thai pharmacies without a prescription.
Bringing it into Thailand
Allowed for personal use
Cetirizine is not a narcotic or psychotropic, so the general Thai rule for personal medicines applies: up to a 30-day supply for your own use, ideally in original labelled packaging. No permit is needed. Combination products with pseudoephedrine (Zyrtec-D) follow the stricter psychotropic rules.
Getting it in Thailand
From a pharmacist, no prescription usually needed
Cetirizine is a commonly stocked allergy medicine in Thai pharmacies and can be bought without a prescription. Ask the pharmacist if you are unsure which product contains it.
- Thai classification
- Not classified/unclear (we could not confirm its Drug Act class from an official source)
- Last checked
- 13 November 2026
- Source quality
- Low: limited sources, confirm with the Thai FDA
What to carry
- Original packaging with the label visible
- No more than 30 days' supply
- A copy of your prescription, if it is a prescription medicine at home
Good to know
- Zyrtec-D and other cetirizine-pseudoephedrine combinations are controlled psychotropics in Thailand.
Rules change. Before you travel, confirm with the Thai FDA (permitfortraveler.fda.moph.go.th) or the Royal Thai Embassy in your country. This page is information, not medical or legal advice.