<p>Adverse reactions associated with Levothyroxine therapy are primarily those of hyperthyroidism due to therapeutic overdose. They include the following:</p>

<ul>
	<li>General: Fatigue, increased appetite, weight loss, heat intolerance, fever, excessive sweating;</li>
	<li>Central nervous system: Headache, hyperactivity, nervousness, anxiety, irritability, emotional lability, insomnia.</li>
	<li>Musculoskeletal: Tremors, muscle weakness.</li>
	<li>Cardiovascular: Palpitations, tachycardia, arrhythmias, increased pulse and blood pressure</li>
	<li>Respiratory: Dyspnea.</li>
	<li>Gastrointestinal: Diarrhea, vomiting, abdominal cramps.</li>
	<li>Dermatologic: Hair loss, flushing.</li>
</ul>