From what I've understood about reg and XR, you should take all your XR in one dose a day because it is released slowly, but the reg like I take should be taken in separate doses before meals (some take it in the middle of the meal because of stomach problems). I take 3 doses of 850 mg a day (2550mg total) of reg met.
If you are uncertain, it might just be best to contact your pharmacist who should be able to tell you the most effective and safe way to take XR.
Good luck with your treatment.
