Pharmacology All of the following statements about lignocaine are true EXCEPT: A It blocks active sodium channels with more affinity than resting sodium channels B It can cause cardiotoxicity C It is given orally for treatment of cardiac arrhythmias D Adrenaline increases the duration of action of lignocaine when used for infiltration anaesthesia. 💡 Explanation All of the following statements about lignocaine are true EXCEPT: ✓ Correct Answer: C. It is given orally for treatment of cardiac arrhythmias