I need help my teenage sons have been known to abuse stimulant drugs. I found a bottle of over the counter cough syrup but not with the orginal medication in it. It was a very thick yellow liquid in it. I'm sure it is something because it was hidden and then when I put it up till the wee[?]kend was over and could show it to someone to identify, someone changed the ingedients to chlorseptic to hide it. (stupid)Need to identify. Is any onw familar with this substance? I have never seen a yellow liquid????