The administration of the Pre OP 1000 mg500 mg Injection is typically done by a healthcare professional and it is not recommended for selfadministration The exact dosage and schedule for this injection will be determined by your doctor based on the severity of your underlying illness It is important to follow your doctors prescription for its use Some common side effects of this medication include nausea vomiting and diarrhea You may also experience some injection site reactions such as pain swelling or redness If these side effects do not improve or persist for a prolonged period it is advised to consult your doctor Before using this medication inform your doctor if you have any allergies to antibiotics or if you have kidney or liver problems Your doctor may adjust the dosage or prescribe a different medication accordingly This medication is generally safe to use during pregnancy under a doctors supervision However if you are breastfeeding it is recommended to consult with your doctor