The new register provides valuable data on exposure to drugs and is useful to study patterns of drug utilization. The possibilities for record linkage to other health registers gives from an international perspective good opportunities to explore drug and disease associations and the risks, benefits, effectiveness and health economical effects of drug use.

There is excessive prescription of psychotropic drugs in Swedish nursing homes. Improved teamwork among caregivers can improve prescribing as defined by clinical guidelines.

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The information content of 6,710 advertisements for medicines in medical journals was surveyed to provide a baseline for monitoring the effect of WHO's Ethical Criteria for Medicinal Drug Promotion. The advertisements (ads) appeared during 12 months (1987-1988) in 23 leading national medical journals in 18 countries. Local participants, mostly doctors or pharmacists, examined them. The presence or absence in each ad of important information was noted. In most ads the generic name appeared in smaller type than the brand name. Indications were mentioned more often than the negative effects of medicines. The ads gave less pharmacological than medical information. However, important warnings and precautions were missing in half, and side effects and contraindications in about 40 percent. Prices tended to be given only in countries where a social security system pays for the medicines. The information content of ads in the developing countries differed surprisingly little from that in the industrialized countries. Almost all the ads (96 percent) included one or more pictures; 58 percent of these were considered irrelevant. The authors believe it is a mistake to regard ads as trivial. If they are not considered seriously they will influence the use of medicines as they are intended to do, but read critically they can provide useful information.

Cases of drug-induced aplastic anaemia, haemolytic anaemia, thrombocytopenia, and agranulocytosis reported to the Swedish Adverse Drug Reaction Committee during the five-year period 1966-70 have been analysed and compared with cases of the same cytopenias from "all" causes. Oral diuretics were a dominant cause of drug-induced thrombocytopenia, methyldopa of haemolytic anaemia, and oxyphenbutazone of aplastic anaemia. Computer systems should help such studies, particularly in showing a changing pattern of complications and causes.