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Important: This site presents data from the FDA Adverse Event Reporting System (FAERS). A report does not mean the drug caused the event. Full disclaimer.

SYNTHROID: 208 Adverse Event Reports & Safety Profile

Thyroid Balance & Feminine Wellness

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208
Total FAERS Reports
5 (2.4%)
Deaths Reported
26
Hospitalizations
208
As Primary/Secondary Suspect
6
Life-Threatening
5
Disabilities

First Report: 1990 · Latest Report: 20140514

What Are the Most Common SYNTHROID Side Effects?

#1 Most Reported
Drug ineffective
21 reports (10.1%)
#2 Most Reported
Fatigue
20 reports (9.6%)
#3 Most Reported
Weight increased
19 reports (9.1%)

All SYNTHROID Side Effects by Frequency

Side Effect Reports % of Total Deaths Hosp.
Drug ineffective 21 10.1% 0 2
Fatigue 20 9.6% 0 2
Feeling abnormal 19 9.1% 1 4
Weight increased 19 9.1% 0 5
Drug hypersensitivity 17 8.2% 0 0
Dyspnoea 17 8.2% 0 3
Malaise 17 8.2% 0 3
Blood thyroid stimulating hormone increased 15 7.2% 0 4
Headache 15 7.2% 0 1
Nausea 14 6.7% 0 5
Pain 14 6.7% 0 2
Alopecia 13 6.3% 0 0
Asthenia 12 5.8% 0 2
Pruritus 12 5.8% 1 2
Arthralgia 10 4.8% 0 2
Chest pain 10 4.8% 0 7
Insomnia 10 4.8% 0 0
Anxiety 9 4.3% 0 0
Urticaria 9 4.3% 0 6
Weight decreased 9 4.3% 0 2

Who Reports SYNTHROID Side Effects? Age & Gender Data

Average age: 56.2 years. Most reports from: US. View detailed demographics →

Is SYNTHROID Getting Safer? Reports by Year

YearReportsDeathsHosp.
2001 2 0 0
2002 1 0 0
2004 1 0 1
2006 1 0 0
2007 3 0 1
2008 2 0 0
2009 4 1 1
2010 5 0 0
2011 5 0 1
2012 11 0 2
2013 51 2 7
2014 23 0 2

View full timeline →

What Is SYNTHROID Used For?

IndicationReports
Hypothyroidism 78
Product used for unknown indication 43
Thyroid disorder 15
Thyroidectomy 9
Autoimmune thyroiditis 7

SYNTHROID vs Alternatives: Which Is Safer?

SYNTHROID vs TACROLIMUS SYNTHROID vs TACROLIMUS\TACROLIMUS ANHYDROUS SYNTHROID vs TADALAFIL SYNTHROID vs TAFAMIDIS SYNTHROID vs TAFAMIDIS MEGLUMINE SYNTHROID vs TAFASITAMAB SYNTHROID vs TAFASITAMAB-CXIX SYNTHROID vs TAFINLAR SYNTHROID vs TAFLUPROST SYNTHROID vs TAGRAXOFUSP-ERZS

Official FDA Label for SYNTHROID

Official prescribing information from the FDA-approved drug label.