Pharmacology Other topics and Adverse effects 68388a6f The duration of spinal anaesthesia depends on all of the following EXCEPT: A Local anaesthetic that is used B Concentration of the local anesthetic used C Posture of the patient D Whether adrenaline has been added to the local anaesthetic High-Yield Explanation (Ref: KDT 6/e p360) Posture of the patient determines the height of block, not the duration.