Human Insulatard 40IU/ml Suspension for Injection is used to improve blood sugar control in adults and children with type 1 and type 2 diabetes mellitus. It maintains blood sugar levels in both adults and children. It contains Insulin isophane, which works by ensuring rapid and consistent sugar control. It is a fast-acting type of insulin that helps to decrease blood sugar levels after the intake of meals. It prevents the chances of developing serious complications of diabetes. It facilitates the reuptake of sugar in muscle and fat cells and, thus, suppresses the production of sugar in the liver. In some cases, you may experience injection site reactions like redness or swelling. Some people gain weight while taking insulin. You may also experience symptoms of hypoglycemia such as cold sweat, cool pale skin, nervousness or tremor, anxious feeling, unusual tiredness or weakness, confusion, difficulty in concentration, drowsiness, excessive hunger, temporary vision changes, headache, nausea and palpitation.