What wld happen if i had an allergy pill when im drinkin?

Ok so i was rele drunk yesterday and mi noes and eyes were itchy so i went in to mi sistas purse to get an allergy pill only one and her bf (lyk mi bro) says dnt ever mix achoo and pills. I was lyk ive takin 22 at once and im still alive lol. so wld it have killed me lol