A peroral aqueous solution having a pH ranging from 2 to 5 and comprising as active ingredient 4-amino-5-chloro-2,3- dihydro-N-[1-(3-methoxypropyl)-4-piperidinyl]-7-benzofuran- carboxamide or a pharmaceutically acceptable acid addition salt thereof and further benzoic acid. A method for its preparation, which comprises including benzoic acid in such solution and adjusting the pH range from 2 to 5.Det er beskrevet en oral vandig oppløsning omfattende prucaloprid eller farmasøytisk akseptable syreaddisjonssalter derav som har god organoleptiske egenskaper.
