Insulin action is short-lived in the human body. By adding the other components it is made long acting like Short acting, Intermediate Acting and Long acting. Hypoglycemia is the most common side effect of insulin therapy. Regardless of the type of insulin your doctor has prescribed, you should follow carefully the dietary and exercise guidelines he or she has recommended. Failure to follow these guidelines or to take your insulin as prescribed may result in serious and potentially life-threatening complications such as hypoglycemia (lowered blood sugar levels). Symptoms of hypoglycemia include confusion, nausea, hunger, tiredness, perspiration, headache, heart palpitations, numbness around the mouth, tingling in the fingers, tremors, muscle weakness, blurred vision, cold temperature, excessive yawning, irritability, and loss of consciousness. Overdose may cause unconsciousness, seizures, muscle weakness, slow or shallow breathing, headache, vomiting, fever, diarrhea, shakiness, nervousness, fast heartbeat, hunger, or sweating. Insulin will prevent the adverse effects of Hyperglycemia on Kidney and Heart. Insulin is beneficial to the heart and Kidney while taken in Type 1 Diabetes. Carry a sugar supplements to compensate the common side effect of Hypoglycemia. The long term effects of insulin are not seen. Insulin has interactions with other drugs so please contact the doctor for any medicine that your are attempting to take.