There are five main classes of active ingredients that are present in OTC
DXM-containing products: decongestants, antihistamines, guaifenesin,
analgesics, and alcohol. Each will be discussed in turn, followed by
“inactive” ingredients. With the possible exception of alcohol, all should
be avoided, although for differing reasons. Some of these other active
ingredients will make your experience unpleasant; others can kill you.
Additionally, some of the dyes and other “inactive” ingredients may cause
some people trouble.
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