Will patients with hypothyroidism gain weight from taking levothyroxine (Euthyrox)?
Jul 09, 2025
Source: Cainiu Health
Dr. Yang Chuanjia
Introduction
Euthyrox is levothyroxine sodium tablets. If the dosage is appropriate, levothyroxine sodium tablets can provide sufficient hormone supplementation, restoring normal thyroid function, increasing the body's metabolic rate, balancing energy expenditure and intake, and preventing abnormal weight gain caused by the medication or the disease itself, thus maintaining a stable weight. Insufficient dosage, however, may fail to improve thyroid function and could potentially lead to weight gain.
Levothyroxine sodium tablets, also known as Euthyrox, generally do not cause weight gain in patients with hypothyroidism when the dosage is appropriate and thyroid function has returned to normal. However, if the dosage is insufficient to improve thyroid function, weight gain may occur. If abnormalities occur, timely medical attention is recommended. Detailed analysis is as follows:
If the dosage is appropriate, levothyroxine sodium tablets can provide sufficient hormone replacement, restoring normal thyroid function, increasing the body's metabolic rate, balancing energy consumption and intake, and maintaining a stable weight without abnormal increases caused by the medication or the disease itself.
When the dosage is insufficient, hypothyroidism persists, hormone levels remain low, metabolic rate remains slow, and calorie consumption decreases. Even without increased food intake, excess energy may be converted into fat, leading to weight gain and obesity, as well as possible accompanying symptoms such as fatigue and cold intolerance.
Patients with hypothyroidism taking levothyroxine sodium tablets should have their thyroid function tested regularly, adjust the dosage according to medical advice, and maintain a balanced diet and regular exercise to prevent abnormal weight changes.
