Common prescription medications for conditions like blood pressure, diabetes, and cholesterol present no issues when carried in reasonable quantities with documentation. A letter from your physician explaining your medical needs is advisable.
Controlled substances, including some painkillers, sleeping pills, and ADHD medications, may require import permits. Check Thailand's Food and Drug Administration guidelines or consult the Thai embassy before traveling if you take controlled medications.
Pharmacies in Thailand are well-stocked, and many medications available only by prescription in Western countries can be purchased over the counter. Pharmacists at reputable chains in major cities often speak English. However, for specialized medications, bring an adequate supply from home.
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