I've never had kidney stones but it's worth a try....can't hurt anything. The only time I get panic attacks from smoking is when I smoke WAY too much indica.I'm more of a sativa person.However you'll want the indica for pain.It relaxes the muscles and helps to relieve swelling from bunched up muscles.But I'd try it.That's far better than filling him up with pills that don't really do much anyway.Good luck to ya! Hope your Dad feels better and they pass swiftly and safely!:hippy: