Not everyone with type 2 diabetes needs insulin. If you do, you and your doctor will decide the best schedule and dose. You may need to adjust dosages yourself if your needs change. You might take long-acting insulin, short-acting insulin, or both. Doctors often start with long-acting insulin, which works for 24 hours or more. You usually take it once a day. Initial doses might be 10 units a day or based on your weight. Your dose may increase every 3 days until your fasting blood sugar is 80-130 mg/dL. Short-acting insulin is taken before meals to help process carbs. You might start with 4-6 units and adjust every 3 days. Another method is matching insulin to carbs eaten. For example, 1 unit of insulin for 10 grams of carbs. Too much insulin can cause low blood sugar (hypoglycemia), which is serious. Symptoms vary but common ones include shakiness and sweating. Check your glucose level if you suspect low blood sugar. If it's below 70 mg/dL, consume 15 grams of glucose, juice, or honey, and recheck in 15 minutes. Some apps claim to help with insulin dosages, but consult your doctor before using them.