Zentiva reported turnover of RON64.7 million, down 3.9% from RON67.35 million in the first quarter of 2010.
Revenue rose 6.5% on the year to RON70.4 million, while total costs were up 10.8% to RON47.8 million.
Zentiva, majority owned by French pharmaceutical group Sanofi-Aventis, had 554 employees at the end of March, down from 581 in the same period a year ago.
Friday in Bucharest, Zentiva closed down 6.7% at RON1.19 a share. (EUR1=RON4.106)