Levothyroxine
A synthetic version of the T4 hormone. Essential for normal growth and mental development in children.
Dosage by Body Weight
Dosing for congenital hypothyroidism is very high in neonates (10-15 mcg/kg) and decreases with age. Must be titrated by an endocrinologist.
- Body Weight
- Newborns (3-5 kg)
- Dose
- 37.5 mcg to 50 mcg
- Frequency
- Once daily
- Tracking Notes
- Crush tablet in a small amount of water/formula; do not use soy formula.
| Body Weight | Dose | Frequency | Tracking Notes |
|---|---|---|---|
| Newborns (3-5 kg) | 37.5 mcg to 50 mcg | Once daily | Crush tablet in a small amount of water/formula; do not use soy formula. |
Formulation
Purpose
Thyroid hormone replacement for hypothyroidism.
Generic Name
Levothyroxine SodiumBranded Drug Names
Levothyroxine is listed as a generic drug name. Common branded medicines that may contain the same active ingredient include:
Scheduled Drug
Yes. This medicine should be supplied or used only according to applicable prescription and regulatory requirements.
Alternatives
Safety Advice
Alcohol
CAUTIONLevothyroxine: Alcohol can affect blood sugar, hormones, or dehydration risk. Avoid or limit alcohol and follow your clinician advice.
Pregnancy
SAFE IF PRESCRIBEDLevothyroxine: Use during pregnancy only with specialist guidance; dose needs may change and monitoring is important.
Breast Feeding
SAFE IF PRESCRIBEDLevothyroxine: Use while breastfeeding only as directed; endocrine treatments often require ongoing clinical monitoring.
Driving
CAUTIONLevothyroxine: May affect alertness indirectly through low blood sugar, dizziness, or hormone imbalance. Avoid driving if symptoms occur.
Liver
CAUTIONLevothyroxine: Use with medical guidance in liver disease, especially when metabolism or blood sugar control may be affected.
Kidney
CAUTIONLevothyroxine: Kidney disease can change dosing or monitoring needs for several endocrine medicines.