Use Humulin R (Insulin Regular) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed. Regular insulin is injected under the skin. A healthcare provider can teach you how to properly use the medication by yourself. Regular insulin must not be given with an insulin pump. Do not inject regular insulin into a vein or a muscle. Read and carefully follow any Instructions for Use provided with your medicine. Ask your doctor or pharmacist if you don't understand all instructions. Prepare an injection only when you are ready to give it. Do not use if the medicine looks cloudy, has changed colors, or has particles in it. Call your pharmacist for new medicine. Prepare your injection only when you are ready to give it. Do not use if the medicine looks cloudy, has changed colors, or has particles in it. Call your pharmacist for new medicine. Your care provider will show you where on your body to inject insulin. Use a different place each time you give an injection. Do not inject into the same place two times in a row. Do not inject this medicine into skin that is damaged, tender, bruised, pitted, thickened, scaly, or has a scar or hard lump. After using regular insulin, you should eat a meal within 30 minutes. Never share a syringe with another person, even if the needle has been changed. Sharing syringes can allow infections or disease to pass from one person to another. You may have low blood sugar (hypoglycemia) and feel very hungry, dizzy, irritable, confused, anxious, or shaky. To quickly treat hypoglycemia, eat or drink a fast-acting source of sugar (fruit juice, hard candy, crackers, raisins, or non-diet soda). Your doctor may prescribe a glucagon injection kit in case you have severe hypoglycemia. Be sure your family or close friends know how to give you this injection in an emergency. Also watch for signs of high blood sugar (hyperglycemia) such as increased thirst or urination. Blood sugar levels can be affected by stress, illness, surgery, exercise, alcohol use, or skipping meals. Ask your doctor before changing your dose or medication schedule. Insulin is only part of a complete treatment program that may also include diet, exercise, weight control, blood sugar testing, and special medical care. Follow your doctor's instructions very closely. In case of emergency, wear or carry medical identification to let others know you have diabetes. Keep this medicine in its original container protected from heat and light. Do not freeze insulin or store it near the cooling element in a refrigerator. Throw away any insulin that has been frozen. Storing unopened (not in use) regular insulin: Refrigerate and use until expiration date; or Store at room temperature and use within the number of days shown in your Instructions for Use. Storing opened (in use) regular insulin: Store at room temperature and use within the number of days shown in your Instructions for Use. Use a needle and syringe only once and then place them in a puncture-proof "sharps" container. Follow state or local laws about how to dispose of this container. Keep it out of the reach of children and pets.