janey47,
Does the L-Glutamine have restrictions other than being taken on an empty stomach?
First I would recommend you take it in powdered form rather than pill form, as it's much more effective that way.
It depends if you're taking it for urgency or for colonic repair.
If you're taking it for urgency, it has to be on an empty stomach.
If you're taking it for colonic repair, then it doesn't.
Other than that, there are no restrictions on taking L-glutamine that I know of.
You should be aware though, that there is a difference between L-Glutamine and GLutamic Acid.