there has been some talk in the past of the BA in the Tren solution (Benzoyl Alchohol) that is with the oil getting absorbed into your bloodstream and causing a cough and I guess possibly getting excreted from your glands. just a reach here, not sure what could cause this. is it "immediate" or a minute or two later? I wonder if something in the solution might also be shutting down the glands (dry mouth might leave you feeling pasty).
not sure, good luck bro-
-Mike