Drug General Information (ID: DDIXHPG7BW)
  Drug Name Ertapenem Drug Info Valproic acid Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Antibiotics Anticonvulsants
  Structure

 Mechanism of Ertapenem-Valproic acid Interaction (Severity Level: Major)
     Antagonize the effect of antiepileptic agents Click to Show/Hide Mechanism Graph
Could Not Find 2D Structure
      Drug Name Ertapenem Valproic acid
      Mechanism Lower seizure threshold Antiepileptic agent
      Key Mechanism Factor 1
Factor Name Antiepileptic agents
Factor Description The beneficial effects of antiepileptic drugs may be reduced, leading to an increase in seizure frequency or duration.
      Mechanism Description
  • Antagonize the effect of Valproic acid when combined with Ertapenem 

Recommended Action
      Management Concomitant use of valproic acid with carbapenem antibiotics is generally not recommended. Use of alternative antibiotics should be considered in patients whose seizures are well controlled on valproic acid therapy. If coadministration is required, supplemental anticonvulsant therapy may be advisable, since increasing the valproic acid dose alone may not be sufficient to overcome the interaction. Nevertheless, pharmacologic response and serum valproate levels should be monitored closely following the addition or withdrawal of carbapenem treatment, and the dosage adjusted as necessary.

References
1 Agencia Espaola de Medicamentos y Productos Sanitarios Healthcare "Centro de informacion online de medicamentos de la AEMPS - CIMA."
2 Molnar GP, Stephens KJ, George LV, Stewart JT "A critical interaction between ertapenem and valproic acid." J Clin Psychopharmacol 35 (2015): 348-50.[PMID: 25871574]
3 Tobin JK, Golightly LK, Kick SD, Jones MA "Valproic acid-carbapenem interaction: report of six cases and a review of the literature." Drug Metabol Drug Interact 24(2-4) (2009): 153-82.[PMID: 20408498]