The most commonly reported side effects of trimethadione include foetal exposure during pregnancy, convulsion, and death, based on 47 FDA adverse event reports from 2004 to 2025. 10.6% of reports found the drug to be ineffective.
Percentages show how often each reaction appears relative to total reports for trimethadione.
These are voluntary reports and do not establish that trimethadione caused these reactions.
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Other drugs that appear in adverse event reports alongside trimethadione. 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
Taken alongside
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.
63.8% of trimethadione adverse event reports involve female patients and 25.5% involve male patients. The largest age group is adult at 44%. These figures reflect who reports side effects, not underlying risk.
Sex
Age group
Conditions and purposes for which patients were taking trimethadione when the adverse event was reported.
Trimethadione is sold under the brand name Tridione.
An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.
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