Acetaminophen / caffeine / magnesium salicylate / phenyltoloxamine and ephedrine / guaifenesin / theophylline Drug Interactions - Drugs.comDrug interactions between acetaminophen / caffeine / magnesium salicylate / phenyltoloxamine and ephedrine / guaifenesin / theophyllineApplies to: ephedrine / guaifenesin / theophylline and acetaminophen / caffeine / magnesium salicylate / phenyltoloxamine
