<prompt> Which of the following is synthetic form of Triiodothyronine T3 ?Liothyronine sodiumLevothyroxine sodiumLiotrixNone of the above  <response>: THYROID AGENTS : 1. Levothyroxine T4 - Sythetic form of thyroxine 2. Liothyronine T3 - Sythetic form of triodothyronine 3. Liotrix - 4:1 ratio of T4: T3 Note : Liothyronine T3 is three to four times more potent than levothyroxine, it is not recommended for routine replacement therapy because of its shoer half-life 24 hours, requiring multiple daily doses, and difficulty in monitoring its adequacy. 