Do NOT try this extraction procedure with cough syrups or formulations containing acetaminophen/paracetamol, pseudoephedrine, other decongestants, or antihistamines. Decongestants and antihistamines are usually alkaloids and will end up in the final product; as for acetaminophen, I'm not convinced yet of the safety of the final product.



Cough syrup (obviously) or some other DXM-containing preparation. The only active ingredients that should be listed are dextromethorphan and guaifenesin. Avoid alcohol (check the inactive ingredients). If you can get DXM-only preparations, do so; the DXM+guaifenesin preparations tend to contain less DXM than the DXM-only ones.
http://www.erowid.org/chemicals/dxm/...hemistry.shtml