🇺🇸 Euthyrox (levothyroxine) in United States

57 US adverse-event reports

Safety signals — FAERS

Adverse reaction reports describe suspected side effects. A report does not mean the drug caused the event — co-medications, underlying disease and coincidence all contribute.

• Window: 22 April 2025 – 22 April 2026
• Total reports: 57

Most-reported reactions

1. Drug Ineffective — 7 reports (12.28%)
2. Maternal Exposure During Pregnancy — 7 reports (12.28%)
3. Asthenia — 6 reports (10.53%)
4. Blood Thyroid Stimulating Hormone Increased — 6 reports (10.53%)
5. Headache — 6 reports (10.53%)
6. Diarrhoea — 5 reports (8.77%)
7. Fatigue — 5 reports (8.77%)
8. Malaise — 5 reports (8.77%)
9. Maternal Drugs Affecting Foetus — 5 reports (8.77%)
10. Renal Failure — 5 reports (8.77%)

Source database →

Frequently asked questions

Is Euthyrox (levothyroxine) approved in United States?

Euthyrox (levothyroxine) does not currently have US marketing authorisation in our dataset.

Who is the marketing authorisation holder for Euthyrox (levothyroxine) in United States?

University Medical Center Groningen is the originator. The local marketing authorisation holder may differ — check the official source linked above.