M Maxiphen-G DM (Dextromethorphan/Guaifenesin/Phenylephrine) by adhealth32 October 10, 2010 What is Maxiphen-G DM (Dextromethorphan/Guaifenesin/Phenylephrine)? Dextromethorphan is a cough suppressant. It affects the signals in…
