Does invokana cause dehydration, if so what can i do to stop that.

Possibly: Invokana causes your kidneys to put out more sugar in the urine. This is used to improve high blood sugars in diabetics. With more sugar in the urine, your body makes more urine. If you don't drink more fluids, there is the possibility that you could become dehydrated. Therefore, you should drink more fluids (without sugar) while on the drug.