Novorex Extra Charge is disposable and the refills cannot be replaced. Novo Rx Special Charge is generally used for stress, and insulin intensive therapy. If you need to inject insulin for a long period of time, you need to buy a NovoPen syringe and replace the refill every time, and the refill is cheap, NovoPen Extra Charge is about$85 per syringe, while NovoPen Refill is only about$70 per syringe. Novorapid Teichon is a short-acting insulin analog that is injected subcutaneously before meals and is mainly used to adjust postprandial hyperglycemia. Insulin injection requires regular review of blood glucose to adjust the insulin dose. While injecting insulin, diabetic patients need to control their diet strictly and increase exercise appropriately to keep their blood glucose within normal value.