About levothyro xine sodium
Thyroid hormone replacement
Used for
- Treats underactive thyroid (hypothyroidism)
- Suppresses thyroid-stimulating hormone in selected thyroid conditions
Usual adult dose
Usually 25–100 micrograms daily initially, adjusted gradually according to blood tests; maintenance often 100–200 micrograms daily.
Usual dose in children
For congenital hypothyroidism, typically 10–15 micrograms/kg once daily initially; doses are adjusted by age and blood tests.
Common side effects
- Fast or irregular heartbeat
- Tremor, anxiety, or difficulty sleeping
- Excess sweating or heat intolerance
- Weight loss or diarrhea
Important warnings
- Too much can cause serious heart problems and bone loss.
- Take consistently on an empty stomach; food and some medicines reduce absorption.
- Separate from iron, calcium, and antacids by at least four hours.
- Dose needs careful adjustment in older adults and people with heart disease.
Pregnancy
Usually continued in pregnancy; requirements often increase, so monitoring and dose adjustment are important.
Breastfeeding
Generally compatible with breastfeeding at prescribed doses.
Interactions
- Iron, calcium, antacids, and some foods reduce absorption.
- Warfarin effects may increase when thyroid levels normalize.
- Some seizure medicines and rifampicin can reduce its effect.
- Biotin can interfere with thyroid blood test results.
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 It may be incomplete or out of date.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.