 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke.This man-made insulin product is the same as human insulin. It replaces the insulin that your body would normally make. It is a mixture of 70% intermediate-acting insulin (isophane) and 30% short-acting insulin (regular). It starts to work as quickly as regular insulin but lasts longer. This insulin product works by helping blood sugar (glucose) get into cells so your body can use it for energy. This product may be used alone or with other oral diabetes drugs (such as metformin). How to use Novolin 70-30 Flexpen Insulin Pen Read the Patient Information Leaflet provided by your pharmacist before you start using combination isophane/regular insulin and each time you get a refill. If you have any questions, ask your doctor, diabetes educator, or pharmacist. Learn all preparation and usage instructions from your health care professional and the product package. Before using, gently roll the vial or cartridge, turning it upside down and back 10 times to mix the medication. Do not shake the container. Check this product visually for particles or discoloration. If either is present, do not use the insulin. Combination is </s>