It is important to discuss this question with your doctor
. Taking a medication like Alprazolam (Xanax) should not affect your levels of thyroid stimulating hormone (TSH), the levels of hormones released by the thyroid itself, or the ability of the lab test to make an accurate measurement of any of these hormones.
Typically, as an initial assessment of thyroid function, the TSH is measured. TSH is released by the pituitary gland in the brain to stimulate the thyroid gland to produce and secrete thyroid hormones. When the TSH lab test returns abnormal, then further testing of the levels of the thyroid hormones is typically done to gain further information about the type of thyroid disease that may exist.
The typical reference range for TSH is 0.4 - 4 mIU/L, but this range can vary depending on the lab. If your lab uses a similar reference range, then your level of 0.237 is below the normal range and may signify the presence of an overactive thyroid gland. Your doctor can then examine the levels of the thyroid hormones; if they are elevated then this would confirm the diagnosis of clinical hyperthyroidism. This can be due to different causes, such as an overactive thyroid nodule, toxic multinodular goiter
, or an autoimmune process like Grave's Disease. It is recommended that you discuss your test results with your doctor so that an appropriate plan for further work-up and testing can be established.