I've seen questions like this, but I have not seen this exact question. Please forgive me if it has been asked. I have found "Dextromethorphan Hydrobromide, Monohydrate, USP" and Dextromethorphan, USP" from a chemical source that seems to be legit. My only problem is, I know going with DXM HBr is safe, but DXM alone is cheaper. I know monohydrate means it has one water molecule per other molecule. What I do not know is if DXM alone is toxic, or less safe than "Hydrobromide." I tried to explain this the best I could. I am not ordering it for himself, but for a friend, and just wants to make sure it is right.