My Husband Was Giving My 1 Year Old Son His

My husband was giving my 1 year old son his Zyrtec. My son was fussing and my husband accidentally squirted it all in fast. My son was choking and couldn't breathe. We patted his back, swiped his throat... He eventually was fine and back to laughing. We just put him to bed... Will he be okay through the night? Could anything have gotten in his lungs?