Also be aware that lactose intolerance is not the same thing as lactose allergy. There's no pill that can help with the latter and milk can fuck you up for several days. So it's not ”just and upset tummy”. It's much more complicated than that and some people, though they are only intolerant, the pills still don't help them at all. Fox example, people with diverticulitis, the pills will not help, the colon will still be gravely upset.