L-Thyroid 12.5mg tablets are used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormones. This medication contains a combination of natural thyroid hormones, mainly levothyroxine and liothyronine, to help normalize thyroid hormone levels in the body. Proper hormone levels are crucial for regulating metabolism, energy, and overall health. L-Thyroid tablets are usually taken once daily, typically on an empty stomach in the morning. Common side effects include weight loss, increased appetite, and nervousness. It’s important to follow your doctor’s dosing instructions closely and to have regular check-ups to monitor thyroid function and adjust the dosage if needed.