Chlorpheniramine; hydrocodone; Pseudoephedrine. Clinical Pharmacology. Accessed 6/23/15 from http://www.clinicalpharmacology.com.
Chlorpheniramine; hydrocodone; Pseudoephedrine. 2015 Lexicomp Drug Information. Accessed 6/24/15 from http://www-uptodate-com.ezproxy3.lhl.uab.edu/contents/chlorpheniramine-phenylephrine-and-dextromethorphan-drug-information?source=search_result&search=chlorpheniramine-phenylephrine-dextromethorphan&selectedTitle=1%7E3
Zutripro (Chlorpheniramine maleate, hydrocodone bitartrate; Pseudoephedrine HCL oral solution). 2014 Hawthorn Pharmaceuticals. http://zutripro.com/
Lexi-Interact. Accessed 6/24/15 from http://www-uptodate-com.ezproxy3.lhl.uab.edu/contents/drug-interaction.