###Human: Will antipsychotics bring down the levels of T3 and T4? ###Assistant: Hi. None of the medications used by your relative is directly related to low levels of total T3 and T4. His current thyroid status is known as a euthyroid sick syndrome. Thyroid supplement should be prescribed only after repeated assessments of thyroid levels. This is because errors are very common even in reputed laboratories. Even after second thyroid assessment, if the reports are similar, it is advisable to supplement with Levothyroxine. Other than correcting the suboptimal thyroid status, Levothyroxine helps in managing residual symptoms of depression and anxiety for which he is taking the current medications. Consult a psychiatrist online for further queries -->