Conversion of T4 to T3 is inhibited by all except
Refer KDT 6/e p250 Methimazole inhibits only thyroid peroxidase whereas propylthiouracil inhibits thyroid peroxidase as well as 5-deiodinase. Later is involveed in peripheral conversion of T4 to T3
Propanolol
Propylthiouracil
Amiodarone
Methimazole
Endocrinology