Gabapentin Dosage Calculator

Written by Great Medico

Updated September 24, 2026 •2 min read

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A dose calculation can be mathematically correct and still be clinically wrong for a particular person. Gabapentin Dosage Calculator therefore focuses on the exact dose rule implemented here and its limitations.

What this calculator does

Gabapentin Dosage Calculator uses Indication, Age, and Weight (needed for age 3–12 epilepsy dosing) to calculate gabapentin reference regimen. Where supported, it also shows Schedule, Reference, and General maximum note so the primary result is easier to check. It follows the exact field flow and engine behavior in this plugin rather than describing a different calculator with the same name. Medication calculations are reference math, not prescriptions. Indication, formulation, route, kidney/liver function, interacting medicines, allergies, maximum doses, and clinician-selected regimens can change the correct dose.

How to use it

Enter or select Indication, Age, and Weight (needed for age 3–12 epilepsy dosing). Confirm weight units, formulation/strength, route, and dose units before reading the result. If an entry is unknown, do not substitute a guess simply to obtain a number.

How the calculation works

For epilepsy in ages 3–12, the calculator uses weight-based starting and effective daily ranges and divides effective doses into three administrations. For other age/indication combinations, it returns the fixed reference regimen stored for that indication. It does not calculate renal adjustment.

Example

Using the sample values prefilled in this calculator, the primary result is 900 mg/day (Gabapentin reference regimen), Schedule is 300 mg three times daily, and Reference is Typical efficient dose for chronic/neuropathic pain. This example demonstrates the plugin’s own calculation path; replace the sample inputs with verified values before interpreting a real result.

How to interpret the result

The result is a reference regimen from the branch selected in the tool. It does not account for renal adjustment or individualized titration and should not be treated as a prescription.

Limitations and notes

Gabapentin dosing is indication- and kidney-function-dependent. Current labeling uses renal adjustment and specific pediatric epilepsy titration; several other indications in this calculator are off-label reference rows. Do not use this tool to start, stop, or taper gabapentin.