Dexmedetomidine in Spinal Anesthesia Decreasing Post Spinal Shivering in Caesarean Section

patients will receive 0.5ml (10 µg) Dexmedetomidine as an adjuvant to 2.2ml hyperbaric Bupivacaine hydrochloride 0.5%

will be given 0.5 ml of one ampoule (2ml) of 100µg fentanyl (Fentanyl Hameln® 0.1mg/2ml - Sunny pharm) equivalent to 25 µg fentanyl as an adjuvant to 2.2ml hyperbaric Bupivacaine hydrochloride 0.5%