Less than two weeks after easing restrictions...

Less than two weeks after easing restrictions on TV drug advertising, the Food and Drug Administration has ordered an immediate halt to television ads for Schering-Plough Corp.’s antihistamine Claritin, saying possible side effects are not explained properly. The company said it was working to resolve the issue; it would not say if the ads were being pulled. . . . MAID, a small, London-based online information provider, said it may make a bid for U.S. newspaper company Knight-Ridder Inc.’s Knight-Ridder Information Inc.