J&J-Merck has sued P&G, makers of PRILOSEC OTC, alleging that the claim “One Pill. Twenty-four hours. Zero Heartburn.” and “Just one and heartburn’s done” are false, as they imply that one pill will eliminate heartburn in 24 hours. In fact, according to the suit, the pill is to be taken once a day for 14 days, and may take 1 to 4 days for full effect. Via MSNBC.COM.