I have been on a combination of Invokana and metformin/glyburide for a few months now to treat my type 2 diabetes. For the last 30 days or so I have been experiencing nausea often - especially after eating and occasionally I will vomit. I have noticed that I vomit more often after a meal in the evening after 7:00 pm or if I have a heavier meal than usual. I have never had this problem before in my life. I have also lost around 25 pounds since going on Invokana. Should I be concerned?