Usually Do not use dextromethorphan and guaifenesin If you're working with or When you've got used an MAO inhibitor in the past 14 days. A unsafe drug interaction could come about. MAO inhibitors involve isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine. Picked from information provided with authorization and copyrighted https://apothekedrogen.eu/