 [ Symptoms ] what does xr after a medication name mean [ Disease ] i am not sure i also have been having severe night sweats body feeling hot then chilled flushing in the facial area and neck i spoke w my doctors they cannot seem to figure it out could be possibly meds you are taking anxiety and stress infection of some kind that is what was told to me i was given a blood test to check my thyroid everything ok you might want to get your thyroid checked through a blood test i hope that this helps in anyway i know what you are going through