The drug use on Curaçao was evaluated with the help of the prescription forms of twelve community pharmacies at Curaçao over a period of three months. The emphasis of the study was on three therapeutic groups: the systemic antibiotics, the psycholeptics and the anti-inflammatory and antirheumatic drugs. Within the group of systemic antibiotics broad-spectrum antibiotics were very frequently prescribed compared with the small-spectrum penicillins. The consumption of psycholeptics, particularly benzodiazepines, on Curaçao is remarkably low in comparison with drug utilization data of Denmark and the Netherlands. In contrast, the number of defined daily doses per 1,000 persons per day of antirheumatic drugs is higher compared with data from these two countries. Within the analysed groups, large differences occur between the two most important kinds of insurance, i.c., the poor people (PP) and social insurance bank (SVB) insurance. The PP-insured patients consume in the case of antibiotics and antirheumatic drugs almost twice as many and in the case of psycholeptics even five times as many as the SVB-insured patients do. A few calculations of prices prove that the extra amount of drugs consumed by PP-insured has important financial consequences.