Hot competition in the high-adrenaline marketplace of energy drinks is causing a flurry of federal trademark actions in South Florida alleging manufacturers are copying their competitor’s packaging to confuse consumers and boost sales.

Last week, Davie, Fla.-based Vital Pharmaceuticals, also known as VPX Sports, appealed a March ruling by U.S. District Judge Donald Middlebrooks that awarded $360,000 in attorney fees and costs to Aurora, Ill.-based American Body Building. VPX makes an energy and fitness drink called Redline, while American makes a drink called Speed Shot.