[Rise in gamma-GT during anticonvulsive therapy]

Area of Science:

• Clinical Biochemistry
• Pharmacology
• Neurology

Context:

• Long-term anticonvulsant drug use is common in epilepsy management.
• Elevated serum gamma-glutamyl transferase (GGT) levels have been anecdotally reported in patients on anticonvulsants.
• Previous studies on the correlation between GGT elevation and epilepsy treatment are inconclusive.

Purpose:

• To investigate the correlation between serum GGT levels and different anticonvulsant regimens in epileptic patients.
• To compare mean GGT levels across various treatment groups.
• To assess the relationship between GGT levels and serum concentrations of antiepileptic drugs.

Summary:

• A retrospective study analyzed 158 epilepsy patients.
• Elevated serum GGT was observed in 103 patients (65%).
• Mean GGT levels were significantly higher in patients treated with phenytoin (PHT), phenobarbital (PB), or primidone (PRM), but not with carbamazepine (CBZ) or valproate (VPR) monotherapy.
• No correlation was found between GGT levels and serum antiepileptic drug concentrations.

Impact:

• The findings suggest that elevated GGT during anticonvulsant therapy reflects hepatic enzyme induction rather than liver damage.
• This distinction is crucial for accurate patient monitoring and avoiding unnecessary interventions.
• Highlights the differential impact of various anticonvulsants on liver enzyme activity.