Post‐operative analgesia is important after surgery to avoid various complications such as venous thromboembolism, respiratory complications and prolonged hospital stay.The transverses abdominis plane (TAP) block blocks T6–L1 nerve branches and is increasingly playing a role in postoperative analgesia for lower abdominal surgeries. It decreases opioid consumption with the benefits of reducing opioid side effects specially nausea and vomiting. Also earlier ambulation and less hospital admission. Various trials have demonstrated the efficacy of transversus abdominis plane (TAP) block as a component of multimodal postoperative analgesia after cesarean section and lower abdominal surgeries.

The block, first described by Rafi in 2001,is a simple and safe technique for analgesia after cesarean section, whether guided by anatomic landmarks or by ultrasound. TAP block in cesarean section is carried out by local anesthetics such as bupivacaine or ropivacaine with a limited duration of action¹.

Ropivacine: It is a long acting anaesthetic drug belonging to amide group of local anaesthtic. Ropivacine have a greater degree of motor sensory differentiation which could be usefull when motor blockade is undersirable. The reduced lipophilicity is also associated with decreased potential for central nervous toxicity and cardiotoxcity. It is metabolized extensively in the liver and excreted in urine(2)

In our study an effort has been made to compare duration post operative analgesia between Ropivacaine with Nalbuphine versus Ropivacaine with Magnesium Sulphate  in patients undergoing lower segmental cesarean section.