Will Euthyrox affect menstruation?
Jul 08, 2025
Source: Cainiu Health
Dr. Yang Chuanjia
Introduction
Under normal circumstances, Euthyrox usually refers to levothyroxine sodium tablets. Whether it affects menstruation primarily depends on the patient's specific health condition and medication history. Thyroid function should be regularly monitored during treatment with levothyroxine sodium, and the appropriate dosage should be determined based on indicators such as thyroid-stimulating hormone (TSH). It is important to ensure accurate medication dosing and avoid adjusting the dose or missing doses without medical advice. If a dose is missed, it should be taken as directed by a healthcare provider.
Generally speaking, Euthyrox usually refers to levothyroxine sodium tablets. Whether it affects menstruation mainly depends on the patient's specific health condition and medication background. Detailed analysis is as follows:
Levothyroxine sodium tablets are primarily used to treat hypothyroidism, by supplementing thyroid hormones to maintain normal metabolic levels. For women whose thyroid function is normal or has reached a stable state through treatment with levothyroxine sodium tablets, this medication typically does not directly cause changes in the menstrual cycle.
In the short term after starting levothyroxine sodium tablets or adjusting the dosage, phenomena such as increased or decreased menstrual flow, prolonged or shortened cycles may occur. This situation is commonly seen during the phase when thyroid function has not yet fully stabilized or when the medication dosage needs adjustment.
Thyroid function should be regularly monitored during the use of levothyroxine sodium tablets, and the dosage should be accurately determined by comprehensive evaluation including thyroid-stimulating hormone levels. Avoid adjusting the dosage by oneself, and if a dose is missed, take it as instructed by a physician. Sudden changes in dosage may worsen endocrine disorders.
