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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.

LEVOTHYROXINE\LIOTHYRONINE: 936 Adverse Event Reports & Safety Profile

Thyroid Balance & Feminine Wellness

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936
Total FAERS Reports
22 (2.4%)
Deaths Reported
174
Hospitalizations
936
As Primary/Secondary Suspect
51
Life-Threatening
143
Disabilities

First Report: 19670101 · Latest Report: 20250820

What Are the Most Common LEVOTHYROXINE\LIOTHYRONINE Side Effects?

#1 Most Reported
Fatigue
261 reports (27.9%)
#2 Most Reported
Palpitations
145 reports (15.5%)
#3 Most Reported
Heart rate increased
117 reports (12.5%)

All LEVOTHYROXINE\LIOTHYRONINE Side Effects by Frequency

Side Effect Reports % of Total Deaths Hosp.
Fatigue 261 27.9% 0 27
Palpitations 145 15.5% 0 20
Heart rate increased 117 12.5% 1 28
Alopecia 116 12.4% 0 9
Recalled product administered 108 11.5% 3 13
Weight increased 101 10.8% 0 7
Feeling abnormal 99 10.6% 0 14
Dizziness 91 9.7% 0 23
Headache 90 9.6% 1 19
Anxiety 81 8.7% 0 11
Product odour abnormal 77 8.2% 0 7
Drug ineffective 75 8.0% 0 11
Dyspnoea 75 8.0% 1 17
Chest pain 74 7.9% 1 10
Nausea 74 7.9% 2 16
Insomnia 66 7.1% 0 9
Asthenia 63 6.7% 2 8
Depression 60 6.4% 0 2
Product substitution issue 60 6.4% 0 3
Arthralgia 55 5.9% 1 9

Who Reports LEVOTHYROXINE\LIOTHYRONINE Side Effects? Age & Gender Data

Gender: 91.3% female, 8.7% male. Average age: 55.6 years. Most reports from: US. View detailed demographics →

Is LEVOTHYROXINE\LIOTHYRONINE Getting Safer? Reports by Year

YearReportsDeathsHosp.
2006 1 0 0
2007 2 0 2
2011 2 0 0
2012 2 0 0
2013 4 0 0
2014 7 0 2
2015 10 1 1
2016 7 0 2
2017 34 0 15
2018 43 0 15
2019 153 2 26
2020 268 3 33
2021 121 1 20
2022 25 1 6
2023 18 0 5
2024 15 1 1
2025 23 4 18

View full timeline →

What Is LEVOTHYROXINE\LIOTHYRONINE Used For?

IndicationReports
Hypothyroidism 503
Product used for unknown indication 115
Autoimmune thyroiditis 96
Thyroid disorder 34
Thyroidectomy 15
Hyperthyroidism 10
Thyroid hormones decreased 10
Accidental exposure to product by child 7
Thyroid hormone replacement therapy 6
Post procedural hypothyroidism 5

LEVOTHYROXINE\LIOTHYRONINE vs Alternatives: Which Is Safer?

LEVOTHYROXINE\LIOTHYRONINE vs LEVOXYL LEVOTHYROXINE\LIOTHYRONINE vs LEXAPRO LEVOTHYROXINE\LIOTHYRONINE vs LEXISCAN LEVOTHYROXINE\LIOTHYRONINE vs LIALDA LEVOTHYROXINE\LIOTHYRONINE vs LIDOCAINE LEVOTHYROXINE\LIOTHYRONINE vs LIDOCAINE\MENTHOL LEVOTHYROXINE\LIOTHYRONINE vs LIDOCAINE\PRILOCAINE LEVOTHYROXINE\LIOTHYRONINE vs LIFILEUCEL LEVOTHYROXINE\LIOTHYRONINE vs LIFITEGRAST LEVOTHYROXINE\LIOTHYRONINE vs LIMAPROST

Official FDA Label for LEVOTHYROXINE\LIOTHYRONINE

Official prescribing information from the FDA-approved drug label.