Daily levothyroxine (LT4) is the standard of care for the treatment of hypothyroidism; however, a small number of patients experience residual symptoms of hypothyroidism. Guidelines indicate that a trial with LT4 and liothyronine (LT3) could be attempted once other conditions have been addressed or excluded. Even so, currently, treatment of hypothyroidism can still be suboptimal.

中文翻译：

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优化甲状腺功能减退症的治疗

每日左旋甲状腺素 (LT4) 是治疗甲状腺功能减退症的标准治疗方法；然而，少数患者会出现甲状腺功能减退症的残留症状。指南指出，一旦解决或排除了其他情况，就可以尝试使用 LT4 和碘塞罗宁 (LT3) 进行试验。即便如此，目前甲状腺功能减退症的治疗仍然不够理想。