levothyroxine sodium /-thī″rəksēn/ , a thyroid hormone. Also called l-thyroxine. ▪ INDICATIONS: It is prescribed in the treatment of hypothyroidism. ▪ CONTRAINDICATIONS: Recent myocardial infarction or known hypersensitivity to this drug prohibits its use. ▪ ADVERSE EFFECTS: The most serious adverse effects are angina, tachycardia, arrhythmias, and tremors.
