All of the following statements about lignocaine are true EXCEPT:
Lidocaine, also known as lignocaine, is a medication used to numb tissue in a specific area (local anesthetic). It is also used to treat ventricular tachycardia and to perform nerve blocks. Lidocaine mixed with a small amount of adrenaline(epinephrine) is available to allow larger doses for numbing, to decrease bleeding, and to make the numbing effect last longer. When used as an injectable, lidocaine typically begins working within four minutes and lasts for half an hour to three hours. Lidocaine mixtures may also be applied directly to the skin or mucous membranes to numb the area.
It blocks active sodium channels with more affinity than resting sodium channels
It can cause cardiotoxicity
It is given orally for treatment of cardiac arrhythmias
Adrenaline increases the duration of action of lignocaine when used for infiltration anaesthesia.
Anesthesia