Guaifenesin/dextromethorphan should not be used with MAO inhibitors like phenelzine (Nardil),selegiline(Zelapar, Emsam, andEldepryl), tranylcypromine (Parnate), procarbazine (Matulane),rasagiline(Azilect) and isocarboxazid (Marplan). Such combinations increase the risk of serious side effects....
Diabetics must check products are not high in sugar. Sugar-free ones include Adult Meltus Chesty Coughs Sugar and Colour-Free.Be careful if taking medication for a stomach ulcer - guaifenesin can sometimes cause gastrointestinal discomfort. Another option is to use a vapourising oil dissolved in ...