<prompt> Propylthiouracil is preferred over Methimazole in treatment of Thyroid storm becauseIt is more potent antithyroid drug.It is less plasma protein boundIt decreases peripheral conversion of T4 to T3All of the above  <response>: Propylthiouracil is preferred over Methimazole in treatment of Thyroid storm because: Propylthiouracil impairs peripheral conversion of T4 - T3 However, PTU is less potent and has higher plasma protein binding as compared to methimazole. 