HEPABIG 100 IU INJECTION is typically administered in conjunction with the hepatitis B vaccine It is derived from human blood plasma and is administered through an injection into a large muscle such as the thigh or buttock Your doctor will determine the appropriate dosage based on your condition It is important to administer the injection as soon as possible after identifying the risk of infection as delaying it may reduce its effectiveness However it is important to note that this medicine is not a vaccine and does not provide longterm protection against hepatitis B There may be some side effects associated with this medicine including flushing gastrointestinal disturbances stomach pain and upset nausea vomiting headache dizziness and discomfort at the injection site If you experience any of these reactions or feel unwell it is important to inform your doctor There may be ways to prevent or lessen the intensity of these side effects Serious reactions to the injection are rare Before using this medicine it is crucial to inform your doctor if you have kidney disease any blood clotting disorders or if you have recently received or plan to receive a vaccination It is uncertain whether this medicine is entirely safe during pregnancy or breastfeeding so it is advisable to seek advice from your doctor in such cases