The ever increasing use of acid suppressive therapy : Descriptive analysis of data from the national wholesale and prescription databases on the consumption of proton pump inhibitor in Norway

Sammanfattning: Pharmacoepidemiological analyses are needed as a background for evaluation of drug use and for making cost-effective priorities. Drug sales and prescription databases provide useful tools for analysis of drug consumption and expenditures. In this essay, an analysis of the sales and prescribing of proton pump inhibitors (PPIs), drugs used for acid related gastric disorders, are presented. Since 1996, the consumption of PPIs in Norway has increased by approximately 10 % per year, with esomeprazole as the most commonly used drug. An increasing number of individuals are using these drugs with considerable costs for the reimbursement schemes, e.g., in 2006 more than 450 million NOK. Verified reflux oesophagitis is the predominant indication for reimbursement prescribing. There are, however, indications of an overprescribing of PPIs. The prescribing in Norway is different from Denmark and Sweden, both regarding choice of drug and level of consumption. The prevalence of PPI use increased with age, reaching a maximum of nearly 12 % in the age groups 70-79 and 80-89 years of age. A considerable proportion is long-term users (> 2 years). These groups have a high risk of polypharmacy treatment. Even though the PPIs have been on the market for many years, negative effects associated with long term use are being discussed and need to be further explored. Attention should be focused on the rational use of PPIs and not only on the reduction of costs for PPI therapy.