 Chlophedianol guaifenesin phenylephrine and dexchlorpheniramine dextromethorphan phenylephrine pyrilamine Drug Interactions - Drugs.comDrug interactions between chlophedianol guaifenesin phenylephrine and dexchlorpheniramine dextromethorphan phenylephrine pyrilamineApplies to: dexchlorpheniramine dextromethorphan phenylephrine pyrilamine and chlophedianol guaifenesin phenylephrine 