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Guaifenesin and Dextromorphan Hydrobromide (DXM HBr 30 mg).
Guaifenesin just helps loosen mucus and clear congestion and DXM is used to get hiiiggghhhh. =
try some of this mucinex its new its got 30 mg. getcha high
by Bumbleebee March 30, 2006
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