Thyroid hormones are administered once a day, early in the morning and preferably before breakfast. An empty stomach increases the absorption of the oral preparation. Levothyroxine (Synthroid) also can be given intravenously and is prepared for administration immediately before use.
The dosage is individualized to the needs of the patient. The dose of thyroid hormones must be carefully adjusted according to the patient's hormone requirements. At times, several upward or downward dosage adjustments must be made until the optimal therapeutic dosage is reached and the patient becomes euthyroid.
Some patients may exhibit anxiety related to the symptoms of their disorder, as well as concern about relief of their symptoms. The patient should be reassured that although relief may not be immediate, symptoms should begin to decrease or even disappear in a few weeks.
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