Hyoscyamine/hexamethylenetetramine/phenyl salicylate/methylene blue/benzoic acid

Hyoscyamine/-hexamethylenetetramine/-phenyl salicylate/-methylene blue/-benzoic acid (trade names Methylphen, Prosed DS) is a discontinued drug combination. It was used to treat pain resulting from bladder infections. It is not safe or effective for any medical purpose.