METHIMAZOLE

N/A

Manufactured by AiPing Pharmaceutical, Inc.

13,542 FDA adverse event reports analyzed

Last updated: 2026-04-14

About METHIMAZOLE

METHIMAZOLE is a medication tracked in the FDA Adverse Event Reporting System (FAERS), manufactured by AiPing Pharmaceutical, Inc.. The most commonly reported adverse reactions for METHIMAZOLE include DRUG INEFFECTIVE, OFF LABEL USE, FATIGUE, HYPERTHYROIDISM, NAUSEA. This page provides a comprehensive breakdown of reported side effects, safety signals, patient demographics, and AI-powered safety analysis for METHIMAZOLE.

Top Adverse Reactions

DRUG INEFFECTIVE607 reports
OFF LABEL USE463 reports
FATIGUE426 reports
HYPERTHYROIDISM384 reports
NAUSEA372 reports
DIARRHOEA325 reports
HEADACHE315 reports
PAIN296 reports
DIZZINESS292 reports
DYSPNOEA266 reports
AGRANULOCYTOSIS243 reports
ASTHENIA212 reports
ARTHRALGIA211 reports
ANXIETY208 reports
RASH208 reports
CONDITION AGGRAVATED196 reports
PRURITUS195 reports
PRODUCT USE IN UNAPPROVED INDICATION193 reports
WEIGHT DECREASED185 reports
PYREXIA177 reports
DEATH174 reports
MUSCLE SPASMS164 reports
FALL163 reports
VOMITING162 reports
MALAISE161 reports
HYPOTHYROIDISM155 reports
ALOPECIA146 reports
INSOMNIA143 reports
COUGH139 reports
PNEUMONIA134 reports
PRODUCT USE ISSUE134 reports
THYROTOXIC CRISIS127 reports
PAIN IN EXTREMITY124 reports
BACK PAIN123 reports
MYALGIA122 reports
DECREASED APPETITE121 reports
ATRIAL FIBRILLATION120 reports
ANAEMIA117 reports
ACUTE KIDNEY INJURY116 reports
CARDIAC ARREST114 reports
ABDOMINAL PAIN113 reports
CONSTIPATION113 reports
NEUTROPENIA111 reports
WEIGHT INCREASED110 reports
TINNITUS109 reports
EMOTIONAL DISTRESS107 reports
HYPOTENSION107 reports
BLOOD PRESSURE INCREASED105 reports
CARDIAC FAILURE103 reports
HYPERTENSION103 reports
PALPITATIONS102 reports
DEPRESSION101 reports
PRODUCT DOSE OMISSION ISSUE101 reports
BLOOD GLUCOSE INCREASED99 reports
FOETAL EXPOSURE DURING PREGNANCY99 reports
GAIT DISTURBANCE98 reports
ABDOMINAL PAIN UPPER97 reports
FEELING ABNORMAL95 reports
DRUG INDUCED LIVER INJURY92 reports
URINARY TRACT INFECTION92 reports
DRUG INTERACTION91 reports
RENAL FAILURE90 reports
CHEST PAIN88 reports
TREMOR88 reports
PERIPHERAL SWELLING87 reports
COVID 1986 reports
DRUG HYPERSENSITIVITY85 reports
GRAVES^ DISEASE85 reports
ABDOMINAL DISCOMFORT83 reports
PARAESTHESIA82 reports
OEDEMA PERIPHERAL78 reports
URTICARIA77 reports
WHITE BLOOD CELL COUNT DECREASED77 reports
OROPHARYNGEAL PAIN76 reports
CHRONIC KIDNEY DISEASE75 reports
MUSCULAR WEAKNESS73 reports
NASOPHARYNGITIS73 reports
TACHYCARDIA73 reports
TREATMENT NONCOMPLIANCE73 reports
DISCOMFORT72 reports
HYPERHIDROSIS72 reports
MATERNAL EXPOSURE DURING PREGNANCY72 reports
RESPIRATORY FAILURE72 reports
HYPERSENSITIVITY70 reports
SOMNOLENCE70 reports
CEREBROVASCULAR ACCIDENT69 reports
CONTUSION69 reports
ENDOCRINE OPHTHALMOPATHY69 reports
HEART RATE INCREASED69 reports
INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION68 reports
INFECTION68 reports
EXPOSURE DURING PREGNANCY65 reports
GASTROINTESTINAL HAEMORRHAGE65 reports
THYROID DISORDER65 reports
INFLUENZA64 reports
PANCYTOPENIA64 reports
SEPSIS63 reports
ABDOMINAL DISTENSION62 reports
THROMBOCYTOPENIA62 reports
VISION BLURRED62 reports

Report Outcomes

Out of 7,409 classified reports for METHIMAZOLE:

Serious 71.2%Non-Serious 28.8%

The FDA classifies an adverse event as “serious” if it results in death, hospitalization, disability, congenital anomaly, or requires intervention to prevent permanent damage.

Demographics Breakdown

Reports by Sex

Female4,801 (71.9%)
Male1,868 (28.0%)
Unknown7 (0.1%)

Reports by Age

Age 59117 reports
Age 74115 reports
Age 73110 reports
Age 68109 reports
Age 75108 reports
Age 70107 reports
Age 72105 reports
Age 50103 reports
Age 62103 reports
Age 52102 reports
Age 53102 reports
Age 65101 reports
Age 71101 reports
Age 66100 reports
Age 6399 reports
Age 6497 reports
Age 6094 reports
Age 6194 reports
Age 5893 reports
Age 6792 reports

Demographics reflect voluntary FDA adverse event reporting patterns and may not represent the full patient population.

Frequently Asked Questions

How many FDA adverse event reports are associated with METHIMAZOLE?

This profile reflects 13,542 FDA FAERS reports that mention METHIMAZOLE. Reporting is voluntary and does not prove that the drug caused any listed event.

Which adverse reactions are most often listed for METHIMAZOLE?

Frequently reported terms in FAERS include DRUG INEFFECTIVE, OFF LABEL USE, FATIGUE, HYPERTHYROIDISM, NAUSEA, DIARRHOEA. Rankings reflect reporting volume in this dataset, not confirmed side effect rates in the general population.

Who manufactures METHIMAZOLE?

Labeling and FAERS entries often list AiPing Pharmaceutical, Inc. in connection with METHIMAZOLE. Always verify the specific product and NDC with your pharmacist.

Important Disclaimer: This content is generated by AI analysis of FDA adverse event reports and is provided for informational purposes only. It is not medical advice. Adverse event reports submitted to the FDA do not prove that a medication caused the reported side effect. Always consult your healthcare provider before starting, stopping, or changing any medication. If you experience a serious side effect, contact your doctor or call 911 immediately.