Anti D 150mcg Injection PFS contains active components called Anti-Rh(D) immunoglobulin. It is a medication used to prevent Rh(D) hemolytic disease of the newborn (HDN). This condition can occur when an Rh-negative mother carries an Rh-positive baby. It significantly reduces the risk of Rh-negative mothers developing antibodies against Rh(D) antigens, which could otherwise lead to HDN in subsequent pregnancies. Individuals with a known severe allergy or hypersensitivity to any component of Anti D Injection should not receive the medication.  It should not be given to Rh-positive mothers as they already have Rh(D) antigens on their red blood cells and cannot develop Rh antibodies. If a woman is already sensitised to Rh(D) antigens (meaning she has developed Rh antibodies in a previous pregnancy or event), administering this medication will not reverse the sensitisation. It is only effective as a preventive measure and should not be given in this situation. Anti D Immunoglobulin Injection is generally considered safe for use in elderly individuals, provided they meet the necessary criteria for administration based on their blood type and medical history. It can be administered to children when it is medically necessary to prevent Rh sensitisation.