Gabapentin Dosage & Adjustment Calculator

Personalized dosing for adults, children, and renal impairment

Enter patient details to calculate the recommended gabapentin dose. This tool supports adult, pediatric, and renal dosing, and provides safety warnings.

Gabapentin Dosage Examples

See how to calculate gabapentin doses for different scenarios.

Adult with Neuropathic Pain

Adult with Neuropathic Pain

A 70 kg, 45-year-old adult with normal renal function, starting gabapentin for neuropathic pain.

Body Weight (kg): 70 kg

Age (years): 45

Indication: Neuropathic Pain

eGFR (ml/min): 90

Frequency (per day): 3

Initial Dose (mg): 300 mg

Target Dose (mg): 1800 mg

Adult with Epilepsy and Renal Impairment

Adult with Epilepsy and Renal Impairment

A 60 kg, 60-year-old adult with eGFR 40 ml/min, starting gabapentin for epilepsy.

Body Weight (kg): 60 kg

Age (years): 60

Indication: Epilepsy

eGFR (ml/min): 40

Frequency (per day): 3

Initial Dose (mg): 300 mg

Target Dose (mg): 1200 mg

Pediatric Neuropathic Pain

Pediatric Neuropathic Pain

A 30 kg, 12-year-old child with normal renal function, starting gabapentin for neuropathic pain.

Body Weight (kg): 30 kg

Age (years): 12

Indication: Neuropathic Pain

eGFR (ml/min): 100

Frequency (per day): 3

Initial Dose (mg): 100 mg

Target Dose (mg): 900 mg

Elderly with Renal Impairment

Elderly with Renal Impairment

An 80-year-old, 55 kg patient with eGFR 25 ml/min, starting gabapentin for neuropathic pain.

Body Weight (kg): 55 kg

Age (years): 80

Indication: Neuropathic Pain

eGFR (ml/min): 25

Frequency (per day): 2

Initial Dose (mg): 100 mg

Target Dose (mg): 600 mg

Other Titles
Understanding Gabapentin Dosage & Adjustment Calculator: A Comprehensive Guide
Everything you need to know about safe and effective gabapentin dosing.

What is Gabapentin and How is Dosage Determined?

  • Gabapentin's clinical uses
  • Standard dosing principles
  • Factors affecting dose selection
Gabapentin is an anticonvulsant and neuropathic pain agent. Dosage depends on indication, age, weight, and renal function.
Gabapentin Dosing Overview

Common Gabapentin Dosing Scenarios

  • Adult neuropathic pain: 300-1800 mg/day in 3 divided doses.
  • Pediatric epilepsy: 10-15 mg/kg/day initially, up to 50 mg/kg/day.

Step-by-Step Guide to Using the Calculator

  • Entering patient data
  • Selecting indication and frequency
  • Reviewing results and warnings
Input the patient's weight, age, indication, renal function, and desired frequency. The calculator provides a recommended dose and safety warnings.
How to Use the Calculator

Step-by-Step Examples

  • A 70 kg adult with normal renal function, neuropathic pain: 1800 mg/day (600 mg x 3).
  • A 60 kg adult with eGFR 40: reduced dose, e.g., 900 mg/day (300 mg x 3).

Real-World Applications of Gabapentin Dosage Calculation

  • Clinical practice
  • Patient education
  • Pharmacy and research
Gabapentin dosing calculators are used by clinicians, pharmacists, and patients to ensure safe and effective therapy.
Applications in Healthcare

Clinical Use Cases

  • Pharmacist checks renal dose adjustment for elderly patient.
  • Doctor calculates pediatric dose for epilepsy.

Common Misconceptions and Correct Methods

  • Overestimating safe dose
  • Ignoring renal function
  • Confusing mg/kg with mg/day
Always check renal function and use mg/kg for children. Do not exceed maximum recommended doses.
Avoiding Dosing Errors

Dosing Pitfalls

  • Do not use adult doses for children.
  • Reduce dose in renal impairment.

Mathematical Derivation and Example Calculations

  • Weight-based dosing formula
  • Renal adjustment algorithm
  • Frequency and single dose calculation
Total daily dose = weight (kg) x mg/kg/day (if pediatric) or fixed mg/day (adult). Renal adjustment: reduce dose per eGFR. Single dose = total daily dose / frequency.
Calculation Formulas

Calculation Examples

  • 30 kg child, 30 mg/kg/day: 900 mg/day, 300 mg x 3.
  • 60 kg adult, eGFR 40, target 1200 mg/day: 400 mg x 3.