Gender differences in adverse drug reactions: analysis of spontaneous reports to a Regional Pharmacovigilance Centre in France

The aim of this study was to investigate putative gender-related differences in adverse drug reactions (ADRs). Data were ADRs recorded in the database of the French Midi-Pyrenees Pharmacovigilance Centre in 1998. A total of 927 ADRs were spontaneously reported to the Centre in 1998, of which 53.1% were in females (difference vs. males not statistically significant). There was no statistically significant difference in the incidence of reported ADRs in males (3.6/10000 inhabitants) vs. females (3.9/10000 inhabitants) for the total population of the Midi-Pyrenees area. The number of reported ADRs was similar across different age groups (10-year age ranges). However, 'serious' ADRs were more frequently reported in males in the 0-9 and 60-69 age groups (and in females between 20 and 29 years old). There were significantly more neuropsychiatric (69 vs. 43, P = 0.05) and fewer cardiovascular (8 vs. 2, P = 0.05) ADRs reported in females than in males. ADRs were more frequently reported in females for some classes of drugs (such as genito-urinary, sex hormone, antineoplastic, antiparasitic and respiratory drugs). These results confirm that female gender is a risk factor for the development of ADRs.