Bupinerve+-Heavy Injection 4 ml is used to reduce pain and discomfort during labour, surgery, dental treatment and other medical procedures. It contains Bupivacaine, which works by blocking the transmission of pain signals and numbing the area. In some cases, this medicine may cause side effects such as weakness, numbness or tingling, restlessness, drowsiness, headache, nausea and vomiting. Inform the doctor if you are pregnant or breastfeeding, taking any other medication, or have any pre-existing medical conditions.