Levothyroxine

Levothyroxine sodium is the primary active ingredient. It is a synthetic form of thyroxine (T4), a hormone naturally produced by the thyroid gland.Inactive ingredients vary depending on the brand and formulation (tablet, capsule, solution). Always check your specific product labeling.

Hypothyroidism (underactive thyroid): Levothyroxine replaces missing or insufficient thyroid hormone.

Goiter (enlarged thyroid gland) when caused by hypothyroidism.

Thyroid cancer after surgery or radioactive iodine treatment.

Myxedema coma (a lifethreatening complication of severe hypothyroidism).

Congenital hypothyroidism (present at birth).

Lethyrox 125mcg Tab 100s (Levothyroxine) replaces the thyroid hormone thyroxine (T4). In the body, T4 is converted to triiodothyronine (T3), which regulates metabolism, growth, and development. By supplementing T4, levothyroxine restores normal thyroid hormone levels and alleviates symptoms of hypothyroidism.

Store at room temperature, away from moisture and heat. Keep out of reach of children. Do not use if the medication is expired or shows signs of discoloration or damage.

Dosage is individualized based on age, weight, and response to treatment. It is crucial to follow your doctor's specific instructions.

Levothyroxine is typically taken once daily, on an empty stomach, at least 30-60 minutes before breakfast.

Do not crush, chew, or break tablets unless specifically instructed by your doctor.

Regular blood tests are necessary to monitor thyroid hormone levels and adjust the dose as needed.

Changes in heart rate (fast or slow)

Weight loss or gain

Tremor or shaking

Increased sweating

Heat intolerance or sensitivity to cold

Changes in menstrual cycles

Insomnia or difficulty sleeping

Muscle weakness or cramps

Diarrhea or constipation

Alcohol Consumption

Moderate alcohol consumption is generally not a major concern, but excessive alcohol use can interfere with medication absorption and worsen side effects. Consult your doctor.



While Driving or operating Machinery

Levothyroxine may cause side effects like dizziness or fatigue which could impact driving ability. Do not operate machinery if affected.



Pregnant & Breastfeeding Women

Levothyroxine is generally safe during pregnancy and breastfeeding but requires close monitoring of both mother and child's thyroid levels.



Children

Dosage is adjusted based on child's age and weight. Regular monitoring is essential.



Kidney

Generally well-tolerated by patients with kidney disease, but close monitoring is advisable.



Liver

Generally well-tolerated by patients with liver disease, but close monitoring is advisable.

Your doctor or pharmacist

Manufacturer's prescribing information

Reputable medical websites (e.g., Mayo Clinic, NHS)