I'm type 1 and as past 3 years have taken metformin 500mg once daily with breakfast to help with insulin resistance in the morning. We are now trying to get hba1c lower for pregnancy so my pre pregnancy nurse has upped the metformin to twice a day. I feel so ill with it. Diarrhoea maybe twice a day which I can cope with but the horrible taste in my mouth and never ending nausea are horrific. I spoke to her about it but she said it should settle in a week or two. Is this true? Is there anything I can do in meantime to help ease the side effects? I always take it with food and drink plenty of water. She wasn't keen on prescribing the slow release but not sure why.