A patient is in pulseless ventricular tachycardia. Two shocks and 1 dose of epinephrine have been given. Which is the next drug/dose to anticipate to administer?
a) Amiodarone 300 mg
b) Lidocaine 1-1.5 mg/kg
c) Adenosine 6 mg
d) Magnesium sulfate 2 grams