Levothyroxine

Common brands: Synthroid, Levoxyl, Euthyrox, Tirosint Sol, Tirosint

Top reporter: Abbvie Inc.

Nonsteroidal Anti-inflammatory Drug [EPC]Corticosteroid [EPC]Benzodiazepine [EPC]Platelet Aggregation Inhibitor [EPC]Provitamin D2 Compound [EPC]
308,080
Total Reports
88,909
Serious Reports
19,965
Death Reports
30
Reported Reactions
Death Report Ratio: High (6.48%)

Patient Demographics

Male
55,447
Female
233,248

Reported Adverse Reactions (30)

Side effects reported in FDA adverse event reports for Levothyroxine.

# Reaction Reports % of Total
1 FATIGUE 26,190
7.1%
2 NAUSEA 22,291
6.0%
3 DRUG INEFFECTIVE 20,783
5.6%
4 HEADACHE 19,080
5.2%
5 DIARRHOEA 18,428
5.0%
6 DYSPNOEA 16,455
4.5%
7 PAIN 16,139
4.4%
8 DIZZINESS 15,593
4.2%
9 ASTHENIA 13,336
3.6%
10 OFF LABEL USE 13,178
3.6%
11 ARTHRALGIA 13,161
3.6%
12 MALAISE 12,256
3.3%
13 VOMITING 11,791
3.2%
14 FALL 11,628
3.1%
15 WEIGHT DECREASED 9,907
2.7%
16 RASH 9,758
2.6%
17 PAIN IN EXTREMITY 9,723
2.6%
18 INSOMNIA 9,545
2.6%
19 PRURITUS 9,501
2.6%
20 ANXIETY 9,140
2.5%
21 WEIGHT INCREASED 8,977
2.4%
22 COUGH 8,687
2.4%
23 PNEUMONIA 8,533
2.3%
24 FEELING ABNORMAL 8,334
2.3%
25 ALOPECIA 8,218
2.2%
26 PYREXIA 8,025
2.2%
27 HYPERTENSION 7,721
2.1%
28 CONSTIPATION 7,707
2.1%
29 BACK PAIN 7,594
2.1%
30 DEATH 7,497
2.0%

Important Disclaimer

FDA adverse event reports are submitted voluntarily and do not prove causation. A reported reaction does not mean the drug caused it. Drugs with more users naturally have more reports. Always consult your doctor or pharmacist before making medication decisions.