About levothyroxine sodium ph eur
Synthetic thyroid hormone
Used for
- Replacement treatment for severe hypothyroidism when oral treatment is unsuitable
- Emergency treatment of myxoedema coma
Usual adult dose
Dose depends on the condition, body weight, age, and heart health; given intravenously by specialist protocols.
Usual dose in children
Specialist-calculated intravenous dose based on age, weight, and condition.
Common side effects
- Fast or irregular heartbeat
- Chest pain
- Tremor or restlessness
- Sweating and heat intolerance
Important warnings
- Excess dosing can cause dangerous heart effects and symptoms of an overactive thyroid.
- Use cautiously in heart disease and older adults.
- Not for weight loss or obesity treatment.
- Intravenous treatment requires medical supervision and monitoring.
Pregnancy
Levothyroxine is generally continued during pregnancy; dose needs may change and monitoring is important.
Breastfeeding
Generally compatible with breastfeeding at appropriate doses.
Interactions
- Calcium, iron, and some antacids reduce absorption of oral levothyroxine.
- Warfarin effects may increase when thyroid levels are corrected.
- Some medicines affect thyroid hormone levels, including amiodarone and enzyme-inducing drugs.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.