Hello, Since you are on metformin and have symptoms of high blood glucose you are suggested to get a follow up clinical examination done by your treating doctor so that your prescription medicines can be evaluated and refilled. Presently, you should switch to healthy lifestyle. Take balanced home made diet. Take natural food that helps to control blood glucose level (moringa, beet, green leafy vegetables, garlic, lentils, fenugreek, etc.) in your daily diet. Cut of carbohydrates, desserts, sugary products and stay active. Do regular exercises to stay fit. Cut on salt, avoid caffeine & alcohol. Stay away from addictions, anxiety-stress. Take adequate rest, stay well hydrated. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician