A fasting sugar level around 300 is quite high and suggests that your diabetes is not well controlled right now, even while using Glimisave-M2. This can happen when diabetes progresses over the years, and the body stops responding as effectively to the same treatment. Diet habits, stress, lack of exercise, infections, poor sleep, or missed medicine timings may also contribute to persistently high sugar levels. Many people feel worried about starting insulin, but treatment decisions depend on how high the sugar levels are, HbA1c results, kidney function, weight, and overall health condition. In some cases, doctors may consider adjusting tablets or adding newer diabetes medicines before insulin, while in others, insulin may be the safest and most effective option to prevent complications. Along with treatment, try to avoid sweets, sugary drinks, white rice in excess, bakery foods, and late-night eating. Regular walking, weight control, proper sleep, and taking medicines on time can support better sugar control naturally. Consult your doctor soon if you have excessive thirst, frequent urination, blurred vision, weight loss, severe weakness, or persistent readings this high.