Trimethadione

Last updated
Trimethadione
Trimethadione.svg
Clinical data
Trade names Tridione
AHFS/Drugs.com Micromedex Detailed Consumer Information
Pregnancy
category
  • X
Routes of
administration
By mouth
ATC code
Legal status
Legal status
  • In general: ℞ (Prescription only)
Pharmacokinetic data
Bioavailability High
Metabolism Demethylated to dimethadione
Elimination half-life 12–24 hours (trimethadione)
6–13 days (dimethadione)
Excretion Renal
Identifiers
  • 3,5,5-Trimethyl-1,3-oxazolidine-2,4-dione
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard 100.004.406 OOjs UI icon edit-ltr-progressive.svg
Chemical and physical data
Formula C6H9NO3
Molar mass 143.142 g·mol−1
3D model (JSmol)
  • O=C1N(C(=O)OC1(C)C)C
  • InChI=1S/C6H9NO3/c1-6(2)4(8)7(3)5(9)10-6/h1-3H3 Yes check.svgY
  • Key:IRYJRGCIQBGHIV-UHFFFAOYSA-N Yes check.svgY
   (verify)

Trimethadione (Tridione) is an oxazolidinedione anticonvulsant. It is most commonly used to treat epileptic conditions that are resistant to other treatments.

Contents

It is primarily effective in treating absence seizures, but can also be used in refractory temporal lobe epilepsy. It is usually administered 3 or 4 times daily, with the total daily dose ranging from 900 mg to 2.4 g. Treatment is most effective when the concentration of its active metabolite, dimethadione, is above 700 µg/mL. Severe adverse reactions are possible, including Steven Johnson syndrome, nephrotoxicity, hepatitis, aplastic anemia, neutropenia, or agranulocytosis. More common adverse effects include drowsiness, hemeralopia, and hiccups. [1] [2]

Fetal trimethadione syndrome

If administered during pregnancy, fetal trimethadione syndrome may result causing facial dysmorphism (short upturned nose, slanted eyebrows), cardiac defects, intrauterine growth restriction (IUGR), and mental retardation. The fetal loss rate while using trimethadione has been reported to be as high as 87%. [3]

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References

  1. American Medical Association Dept of Drugs (1977). AMA Drug Evaluations (3rd ed.). Littleton, Mass.: Pub. Sciences Group. p. 466. ISBN   978-0-88416-175-2. OCLC   1024170745.
  2. Rodman MJ, Smith DW (1979). Pharmacology and Drug Therapy in Nursing. p. 259. ISBN   978-0-39754-230-7.
  3. Teratology and Drug Use During Pregnancy Retrieved January 2007