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T3) Side Effects

The most commonly reported side effects of t3) include weight increased, loss of consciousness, and insomnia, based on 135 FDA adverse event reports from 2004 to 2025. 6.7% of reports found the drug to be ineffective.

T3) side effects

Percentages show how often each reaction appears relative to total reports for t3).

1
Weight Increased8.1%11
2
Drug Ineffective6.7%9
3
Loss Of Consciousness5.9%8
4
Insomnia5.2%7
5
Hypertension5.2%7
6
Fall5.2%7
7
Blood Pressure Increased4.4%6
8
Fatigue4.4%6
9
Pharmaceutical Product Complaint4.4%6
10
Chest Pain4.4%6
11
Cerebrovascular Accident4.4%6
12
Dyspnoea4.4%6
13
Atrial Fibrillation4.4%6
14
Dizziness3.7%5
15
Muscle Spasms3.7%5

These are voluntary reports and do not establish that t3) caused these reactions.

Report severity

75.6%Serious102 reports
43.0%Hospitalizations58 reports
7.4%Fatal10 reports

Seriousness is determined by the reporter, not by OpenClaim.

T3) drug interactions

Other drugs that appear in adverse event reports alongside t3). Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.

Also suspected

1
Liotrix-t417.8%24
2
Insulin4.4%6
3
Quetiapine-fumarate3.7%5
4
Rofecoxib3.0%4
5
Salmeterol-xinafoate3.0%4
6
Ethinyl-estradiol3.0%4
7
Medroxyprogesterone-acetate3.0%4
8
Estropipate3.0%4
9
Levothyroxine-sodium3.0%4
10
Fluticasone2.2%3
11
Exenatide-synthetic2.2%3
12
Natalizumab2.2%3
13
Pregabalin2.2%3
14
Estradiol2.2%3
15
Norethindrone2.2%3

Taken alongside

1
Liotrix-t482.2%111
2
Acetaminophen14.1%19
3
Furosemide13.3%18
4
Aspirin11.9%16
5
Levothyroxine-sodium11.1%15
6
Hydrochlorothiazide10.4%14
7
Atorvastatin-calcium8.1%11
8
Fluticasone8.1%11
9
Pantoprazole-sodium7.4%10
10
Estrogens7.4%10
11
Esomeprazole7.4%10
12
Spironolactone7.4%10
13
Bupropion6.7%9
14
Tramadol-hydrochloride6.7%9
15
Salmeterol-xinafoate6.7%9

Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.

Who reports t3) side effects

84.4% of t3) adverse event reports involve female patients and 11.1% involve male patients. The largest age group is adult at 58%. These figures reflect who reports side effects, not underlying risk.

Sex

Female84.4%
Male11.1%
Unknown4.4%

Age group

< 20.0%
2–110.0%
12–170.0%
18–6457.8%
65+42.2%

What is t3) used for

Conditions and purposes for which patients were taking t3) when the adverse event was reported.

Autoimmune ThyroiditisDrug Use For Unknown IndicationHormone Replacement TherapyHyperthyroidismHypothyroidismProduct Used For Unknown IndicationProduct Used For Unknown IndicationThyroid DisorderThyroid NeoplasmThyroid Operation

T3) brand names and reporting trend

Quarterly reports (20042025)

2005201020152025

An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.

Taking t3) with another medication?

Ask OpenClaim about your specific drug combination. Get a sourced report using FDA data, drug labels, and medical literature.