Drugmaker Vivus Inc. said Monday that regulators will take another three months to make a decision on its closely-watched obesity drug Qnexa, which could become the first new prescription drug to reach the market in more than a decade.

Walgreen's first-quarter earnings fell more than 4 percent due in part to a slow flu season and its split with the Express Scripts pharmacy network.

CVS Caremark Corp.'s third-quarter net income climbed 7 percent as a long-term contract and an acquisition gave it more pharmacy network claims to process.

Drugstore operator Walgreen Co. said Thursday that its sales grew in October, but the results were weaker than expected and the company acknowledged a dispute with pharmacy benefits manager Express Scripts Inc. is hurting its results.

Medco Health Solutions Inc.'s third-quarter net income fell 4 percent because of expenses related to its pending acquisition by competitor Express Scripts Inc.

Pharmacy benefits manager Express Scripts Inc. said Wednesday that it is suing Walgreen Co., arguing the drugstore chain is trying to lure away its customers.

Omnicare Inc. on Tuesday went public with a $457 million offer for pharmacy management services company PharMerica Corp., sending shares of both companies surging.

Walgreen Co. said Tuesday it will end a $5.3-billion-per-year relationship with Express Scripts Inc., saying Express Scripts was not paying it enough money to fill prescriptions and was trying to dictate terms of their partnership.