Hello. I have just been to see doctor and my bloods have gone up from 6 to 9. I am putting on weight and no diet is helping me so she suggested i take Invokana 100mg. I am also on Metformin SR 2000mg a day atorvostatin 40mg 1 a day and ramipril 5mg a day. My question is I have never tested my blood sugars and was wondering how do I know these tablets are working. I have been on Invokana for 1 week and have lost 6lb already which is pleasing. Only symptoms so far are tiredness and nausea but combating the sickness feeling by drinking ginger tea, so far so good. If I am to test my own bloods should a nurse show me how to do my readings and which machine would I choose as there are so many out there.