Objectives: The objective of this study is to analyze the impact of the new regulation concerning entry of pharmacies into the Norwegian pharmaceuticals market in 2001 on cost and availability of pharmaceutical products. Methods: In order to study costs, a translog cost function is estimated using data from the annual reports of a sample of Norwegian pharmacies before and after the deregulation of the market. Linear regression models for the number of pharmacies in each region in Norway are also estimated. Results: The results show that the costs of the individual pharmacies have not decreased as a consequence of the deregulation of the Norwegian pharmaceuticals market. The deregulation of the market did, however, increase the availability to pharmacy services substantially. Conclusions: Increased availability of pharmacy services can be achieved by deregulating pharmaceutical markets as in Norway, but at the expense of increased costs for the pharmacies. (c) 2007 Elsevier Ireland Ltd. All rights reserved.