 Chlorpheniramine methscopolamine phenylephrine and Trifed C Drug Interactions - Drugs.comDrug interactions between chlorpheniramine methscopolamine phenylephrine and Trifed CApplies to: Trifed C codeine pseudoephedrine triprolidine and chlorpheniramine methscopolamine phenylephrineApplies to: chlorpheniramine methscopolamine phenylephrine and Trifed C codeine pseudoephedrine triprolidine 