 <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]  by helping blood sugar (glucose) get into cells so your body can use it for energy. Insulin isophane is often used in combination with a shorter-acting insulin. It may also be used alone or with other oral diabetes drugs (such as metformin). How to use Humulin N Vial Read the Patient Information Leaflet provided by your pharmacist before you start using insulin isophane 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 right side up 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. Insulin isophane should look evenly cloudy/milky after mixing. Do not use if you see clumps of white material, a "frosty" appearance, or particles stuck to the sides of the vial or cartridge. Before injecting each dose, clean the injection site with rubbing alcohol. Change where you inject each time to lessen the risk of problems or damage under the </s>