Comparative Pharmacology
Head-to-head clinical analysis: DEPAKOTE CP versus GABAPENTIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DEPAKOTE CP versus GABAPENTIN.
DEPAKOTE CP vs GABAPENTIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Valproate increases GABA concentration in the brain by inhibiting GABA transaminase and succinic semialdehyde dehydrogenase. It also blocks voltage-gated sodium channels and T-type calcium channels.
Gabapentin is a structural analog of GABA but does not bind to GABA receptors. It binds to the α2δ subunit of voltage-gated calcium channels, reducing calcium influx and decreasing the release of excitatory neurotransmitters.
250-500 mg orally twice daily, titrated by 250 mg/day every 3-7 days; maximum 60 mg/kg/day. Target trough serum concentration: 50-100 mcg/mL.
Initial dose: 300 mg orally once daily on day 1, 300 mg twice daily on day 2, then 300 mg three times daily on day 3; titrate as needed up to 1800-3600 mg/day in three divided doses. Maximum single dose: 1200 mg. Dose adjustments for renal impairment should be made based on creatinine clearance.
None Documented
None Documented
Clinical Note
moderateGabapentin + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Gabapentin is combined with Fluticasone propionate."
Clinical Note
moderateGabapentin + Erythromycin
"The metabolism of Erythromycin can be decreased when combined with Gabapentin."
Clinical Note
moderateGabapentin + Fluconazole
"The serum concentration of Fluconazole can be increased when it is combined with Gabapentin."
Clinical Note
moderateGabapentin + Clemastine
Terminal elimination half-life is 9-16 hours (mean ~12 hours) in adults; prolonged in hepatic impairment, elderly, and neonates.
5-7 hours (normal renal function); prolonged to 50-140 hours in end-stage renal disease; half-life independent of dose due to linear kinetics.
Renal: 30-50% as glucuronide conjugates, 3% as unchanged drug; fecal: minimal; less than 3% excreted in bile.
Renal: 76-81% unchanged in urine; biliary/fecal: <5% as metabolites; remainder (10-20%) as minor metabolites via urine.
Category C
Category A/B
Anticonvulsant
Anticonvulsant
"The risk or severity of adverse effects can be increased when Gabapentin is combined with Clemastine."