Title:Differential Pharmacokinetic Interplay of Atorvastatin on Lacosamide and
Levetiracetam on Experimental Convulsions in Mice
Volume: 24
Issue: 9
Author(s): Jayaraman Rajangam*, Arun Prasath Lakshmanan, Narahari N. Palei, Karthikeyan Elumalai, Muddukrishnaiah Kotakonda, R. Prakash and P Latha
Affiliation:
- Shri Venkateshwara College of Pharmacy, Ariyur, Pondicherry, 605102, India
Keywords:
Atorvastatin, lacosamide, levetiracetam, epilepsy, pentylenetetrazol, pharmacokinetics.
Abstract:
Background: The beneficial effects of statins, other than their hypocholesterolemia role, have been
well documented, however, their use as an adjuvant drug with other antiseizure drugs, in the treatment of epilepsy
is poorly understood.
Objective: This study aimed to investigate the symbiotic effect of ATOR along with either lacosamide (LACO) or
levetiracetam (LEVE) on experimentally induced epilepsy (Maximal electro-shock-MES or pentylenetetrazol-
PTZ) in mice models.
Methods: Conventional elevated-maze (EPM) and rotarod methods were performed to observe the behavioral
effects.
Results: In both the animal models, we found that co-administration of ATOR along with LACO showed a significant
reduction in hind-limb extension (HLE) and clonic convulsion (CC) responses, respectively, but not in the
ATOR+LEVE treated group. Intriguingly, comparable Straub tail response and myoclonic convulsion as the diazepam
(DIA) group were observed only in the ATOR+LACO treated group. Moreover, a significant muscle-grip
strength was observed in both groups. Also, pharmacokinetic analysis has indicated that the mean plasma concentration
of ATOR peaked at 2nd hr in the presence of LACO but marginally peaked in the presence of LEVE. An Insilico
study has revealed that ATOR has a higher binding affinity toward neuronal sodium channels.
Conclusion: This study has demonstrated that the plasma concentration of ATOR was potentiated in the presence
of LACO, but not in the presence of LEVE and it has provided significant protection against both the electro and
chemo-convulsive models in mice. This could be due to the symbiotic pharmacokinetic interplay of ATOR with
LACO, and possibly, this interplay may interfere with sodium channel conductance.