Key takeaways
Dextromethorphan (Delsym) and Deconex DMX (dextromethorphan/guaifenesin/phenylephrine) are both over-the-counter medications used to relieve cough, but they have different ingredients and uses. Dextromethorphan is a cough suppressant that works by acting on the part of your brain that makes you cough. It is available in various forms, including sugar-free options, making it suitable for people with diabetes. On the other hand, Deconex DMX combines a cough suppressant (dextromethorphan), an expectorant (guaifenesin), and a decongestant (phenylephrine). This combination not only suppresses cough but also helps to loosen mucus and relieve nasal congestion. Like with dextromethorphan, it comes in tablet and liquid formulations. While dextromethorphan is typically taken every 12 hours, Deconex DMX needs to be taken every 4 to 6 hours. Additionally, Deconex DMX has more restrictions for children and potential risks for people with certain health conditions. Both medications should be used cautiously to avoid overdose and interactions with other medicines, particularly certain antidepressants.
