Neepa Patel, Bhumika J Chaudhari, Pratik D Patel and Malti Pandya 2025. Comparison of Efficacy and Hemodynamic Stability of 0.5 % Isobaric Levobupivacaine and 0.5% Hyperbaric Bupivacaine in Old Age Patients Posted For Lower Limb Surgery under Spinal Anaesthesia. International Journal of Pharmacy Research & Technology (IJPRT). 15, 1 (Apr. 2025), 213–221.