(Continued)
He wrote that the plaintiffs would have to meet two criteria to prove their case: that fluoride is a prescription drug under federal law and that it is listed in the 2009 edition of the Drug Topics Red Book. 

“Because the FDA does not regulate public drinking water or drinking water 
additives, it is impossible for plaintiffs to prove that the first requirement for being a [prescription drug] under Washington law is met,” he said.