Benefits

• Restoration of thyroid hormone levels
• Metabolism regulation
• Symptom relief of hypothyroidism
• Improved energy levels
• Maintaining body weight
• Prevention of complications from untreated hypothyroidism

Side-effects

• Feeling sick (nausea)
• Vomiting
• Diarrhea
• Headaches
• Restlessness, excitability, or sleep problems
• Flushing or sweating
• Muscle cramps
• Shaking, usually of the hands
• Rare but possible serious allergic reaction (anaphylaxis)

Black Box Warning: Thyroid hormone should not be used to treat obesity in patients with normal thyroid function. Levothyroxine is ineffective for weight reduction in normal thyroid patients and may cause serious or life-threatening toxicity, especially when taken with amphetamines. Talk to your doctor about the potential risks associated with this medication.