I'm currently doing slimming world and have lost 16.5 Lbs in 5 weeks, I've never felt better however, my practice nurse has just started me on metformin due to my last blood test being high I wanted to give it another 3 months to continue living weight at SW before I start treatment but I was told I should commence the tablets. The other day whilst at my SW group I became unwell, sweating profusely, dizzy, losing balance and unable to focus. When I reached home I was violently sick and had diarrhoea, I had started on 500 mg of metformin and was told to increase it to a 1000mg after a week then 1500mg on my third week. When I rang the practice nurse she told me to stop taking the medication until I felt better then reintroduce the medication, I'm very reluctant