If your blood sugar is still not controlled despite taking high doses of Human Mixtard 70/30, you should not stop or reduce insulin on your own. In many people with diabetes, poor control may happen because of incorrect injection timing, diet issues, lack of physical activity, stress, infections, weight gain, or reduced insulin effectiveness over time. Sometimes the insulin plan itself may need adjustment. There are safe ways to reduce insulin requirement, but this should be done gradually under medical supervision. Losing excess weight, following a balanced diabetic diet, avoiding sugary foods, engaging in regular walking or exercise, and taking insulin correctly before meals can improve blood sugar control and may lower insulin needs. Your doctor may also check whether you would benefit from a different insulin regimen or additional diabetes medicines. It is important to monitor blood sugar regularly and keep a record of fasting and post-meal readings. Never skip insulin suddenly, as this may lead to dangerously high blood sugar or diabetic complications. Please consult your doctor for a full review of your treatment plan.