Hiccups

Mike came home from the Hospital on Saturday morning and he is doing OK. He's still in a lot of pain. The worst part is that he has literally had the hiccups since he came out of his surgery on TUESDAY! He has them all day long and all night long. It keeps him (and myself) awake at night. He has taken some sleep aids at night, which helps him sleep but doesn't stop the hiccups. Any suggestions, home remedies, old wives tales, etc. would be greatly appreciated.