Hi. Thanks for your query. Read and understood your history of your boyfriend having a couple of spells of feeling of choking over and unable to get breath, first time occurring while taking beer. Now that he got this without any eating r drinking at this particular time. The possible causes are: Severe inflammation in the throat. Stress and anxiety can cause such symptoms. I would advise him the following: Get an opinion, clinical evaluation and examination including endoscopy and evaluation of the psychological pressures done so that the proper diagnosis and treatment can be instituted.