Compare thyroid medications for hypothyroidism and hyperthyroidism. Find the right levothyroxine dose or alternative thyroid hormone replacement therapy.
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Compare Two Drugs →Both contain the same active ingredient. Some patients prefer brand-name Synthroid for consistency, but generic levothyroxine is equally effective and much cheaper for most people.
It typically takes 6-8 weeks to see the full effect of a thyroid medication dose. Your doctor will check TSH levels and adjust as needed.
Most thyroid medications should be taken on an empty stomach, 30-60 minutes before breakfast, for best absorption. Avoid calcium, iron, and antacids within 4 hours.