Saizen 5mg Injection is a medicine that is identical to the main form of the naturally occurring human growth hormone. It is used to treat children with growth failure due to inadequate secretion of endogenous growth hormone (GH). It is used to treat short stature in adults also. Saizen 5mg Injection is given as an injection into the skin under the supervision of a doctor. Your doctor or nurse will help you to learn the exact method of self-administration. You should receive appropriate training and instructions from the physician before using it. The dose and how often you take it depends on what you are taking it for. You should take this medicine for as long as it is prescribed for you. The most common side effects of this medicine include injection site reaction, headache, and rash. If these bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. Before taking this medicine, tell your doctor if you have ever had diabetes, or have a thyroid disorder. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Tell your doctor if you are pregnant, planning pregnancy or breastfeeding. You may be asked for regular monitoring of blood sugar levels, kidney function and level of growth hormone before and during the treatment.