[Dispensing of benzodiazepines and Z drugs by Norwegian pharmacies 2004-2011].
2013
BACKGROUND: In Norway, total sales of benzodiazepines and Z drugs (zopiclone and zolpidem) have increased since the mid-1990s. On the basis of data from the Norwegian Prescription Database, we have studied the choice of medications and patterns of use in various gender and age groups. MATERIAL AND METHOD: Numbers for redemptions of benzodiazepines and Z drugs in Norwegian pharmacies for the years 2004-2011 were collected from the Prescription Registry. Population figures were collected from Statistics Norway. Consumption was calculated by the number of DDDs (defined daily doses). RESULTS: Among those who were supplied with benzodiazepines or Z drugs, recipients of more than 2 DDDs per day (heavy users) accounted for a small group. We registered an extensive use of Z drugs among older women, many of whom were prescribed an amount corresponding to a regular daily use of 1-2 DDDs. The total prescription of alprazolam and nitrazepam/flunitrazepam was minor, but high dosages were not uncommon among those who were prescribed these drugs. Only a small proportion of the patients who were prescribed clonazepam received a reimbursable prescription. The prescribing of a number of benzodiazepines and Z drugs at the same time remains not uncommon. INTERPRETATION: Prescribing of Z drugs to the elderly, and to women in particular, may indicate that many people in this group are regular users of sedative hypnotics, which is contrary to the guidelines. A considerable proportion of the prescriptions for clonazepam are outside of the approved indications. Among the users of the drugs studied, only a small fraction were heavy users, but since the use is widespread, this represents a considerable number of individuals.
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