Can lactose tolerance after a course of antibiotics and diarrohea be temporary and go away?

Abx and dairy intol: Yes. Very common. Give the dairy a rest for a couple of weeks after you have completed your antibiotics then reintroduce it to your diet and see what happens. Should be ok at that point. Taking a probiotic supplement can also help replace some of the helpful bacterial in your digestive system that was wiped out by the antibiotics. Hope this helps Good luck

Yes : Drink plenty of fluids to keep up with the fluid loss during the diarrhea. If diarrhea doesn't resolve see your doctor.