Coriciin, Coricidin 'D' (decongestant), or CoricidinHBP (for high blood pressure), is the name of a drug marketed by Schering-Plough that contains dextromethorphan (a cough suppressant) and chlorphenamine maleate (an antihistamine). Varieties of Coricidin may also contain acetaminophen (an analgesic/fever reducer) and guaifenesin (an expectorant).