Suggest Treatment For Choking And Vomiting

My husband had just made a bowl of potroast he took 2 bites and than started choking he quickly took a drink and than started choking more ....throw up and gasping for air he felt like he had something stuck in the back of his throat. He finally threw up a piece of meat . He can breath fine now ...but now he tries to thake a drink to help push it down . He says that it feels like the liquid sits on top of whatever is in his throat and then throw the liquid up ... any ideas? ,,please help
Thank you