The state of Arizona has filed a lawsuit against McKesson Corp., alleging the nation's largest drug wholesaler has artificially inflated the prices of more than 400 brand-name prescription drugs. Among the drugs that are alleged to have been marked-up inappropriately are: Allegra, Azmacort, Celebrex, Coumadin, Flonase, Lipitor, Neurontin, Nexium, Prevacid and Valium. The complaint was filed in Maricopa County Superior Court, alleging that the scheme began in 2000 to mark up the average wholesale price of many prescription drugs, costing consumers millions of dollars, according to Arizona Attorney General Tom Horne. The San Francisco company controls about one-third of the national wholesale drug distribution market, Horne said.