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  • Title: Pharmacogenetically hazardous drugs: a proposed new scoring method.
    Author: Szórády I, Sánta A.
    Journal: Acta Physiol Hung; 1991; 77(3-4):305-18. PubMed ID: 1755332.
    Abstract:
    Similar doses of a drug given to different individuals can result in widely disparate plasma concentrations and hence effects. Beside intraindividual differences also inter-ethnic differences of drug response must be taken into consideration. Both inter-individual and inter-ethnic variations of drug response are mostly related to genetic factors (polymorphism) involved in drug metabolism and kinetics. The farmacogenetic disorders involved clinically result in pharmacogenetic side effects. In order to avoid pharmacogenetic side effects, beside phenotyping of the patients, selection of drugs subjected to different pharmacogenetic disorders may be of great clinical importance. Therefore, a scoring method was carried out for the selection of pharmacogenetically hazardous drugs. With regard to both genetic and environmental factors influencing the drug response, 140 suspicious drugs were studied and classified with the method. Eighteen was the maximum point value for genetic and 12 for contributing factors involved, so 30 was the maximum point number in each drug studied. Out of 140 substances 50 drugs (qualified with 20 points or more) proved to be hazardous in different pharmacogenetic disorders, among them several widely used agents, e.g. Diazepam, Isoniazid, Phenytoin, Warfarin, Quinidine, Tolbutamide, etc. The article sums up the findings in a Table and comments them. This scoring method may be useful in drug safety and preventive medicine.
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