It wasn't always so difficult. I used to travel extensively from another country and for 3 or 4 years was prescribed rohypnol as a mild sleeping tablet for use on those trips. Probably 3 decades ago on a vacation in Bangkok, I thought I'd check if any pharmacy had them just to save me going to my doctor at home. In a pharmacy on Patpong 2, I inquired about the drug. The duty pharmacist said they would soon be made prescrption only drugs by the Thai government but he did have some he could sell me. He leaned below the counter and brought out a large bottle with l;ots of pills. "There's about 1,000 here. Will that be enough?"