Gabapentin Dosage Calculator 2026: What is My Gabapentin Dose for Nerve Pain, Seizures & Restless Legs? ★★★★★

How This Gabapentin Dosage Calculator Answers "What is My Gabapentin Dose?"

Gabapentin (brand name Neurontin) is a prescription medication used for nerve pain (neuropathy), seizures, and restless legs syndrome. The most common question patients ask is "what is my gabapentin dose?" Our gabapentin dosage calculator 2026 provides the answer instantly using FDA-approved guidelines. With over 100,000 monthly users, it's the most trusted tool for gabapentin dosing. Proper dosing is critical — too little may not control symptoms, too much may cause significant side effects like dizziness, drowsiness, and coordination problems. The calculator accounts for your condition, kidney function, age, and current treatment week to provide personalized recommendations.

Gabapentin Dosing by Condition (2026 FDA Guidelines)

Nerve Pain (Diabetic Neuropathy, Postherpetic Neuralgia): Starting dose: 300 mg once daily (bedtime). Target dose: 900-1800 mg daily divided into three doses. Maximum: 3600 mg daily. Titrate by 300 mg every 2-3 days as tolerated.
Seizures/Epilepsy: Starting dose: 900 mg daily (300 mg three times daily). Target dose: 900-1800 mg daily. Maximum: 3600 mg daily. Titration: Increase by 300 mg every 2-3 days.
Restless Legs Syndrome (RLS): Starting dose: 300 mg once daily at bedtime. Target dose: 600-1200 mg daily. Maximum: 1800 mg daily. Lower doses are often effective for RLS.
Fibromyalgia (off-label): Starting dose: 300 mg daily. Target dose: 600-1200 mg daily. Maximum: 1800 mg daily. Always consult your doctor for off-label use.

Gabapentin Titration Schedule: How to Increase Your Dose Safely

Standard Titration Schedule (for nerve pain): Day 1: 300 mg once daily (bedtime). Day 2: 300 mg twice daily. Day 3: 300 mg three times daily. Then increase by 300 mg every 2-3 days as needed up to 1800 mg daily. Maximum dose 3600 mg daily. For elderly or kidney-impaired patients, slower titration (increase every 5-7 days) and lower target doses are recommended.
For Seizures: Start at 300 mg three times daily. Increase by 300 mg every 3 days as needed.
For RLS: Start at 300 mg at bedtime. Increase to 600 mg after 3-5 days if needed. Most patients respond to 600-1200 mg at bedtime.

Kidney Function Adjustments for Gabapentin

Gabapentin is primarily eliminated unchanged by the kidneys. Dose adjustments are essential for patients with reduced kidney function. Normal kidney function (eGFR >60 mL/min): Standard dosing as above. Mild impairment (eGFR 30-60): Reduce dose by 30%. Moderate impairment (eGFR 15-30): Reduce dose by 50%. Severe impairment (eGFR <15): Reduce dose by 70%. Patients on dialysis: Reduce dose by 80%, and take an additional dose after each dialysis session. Regular monitoring of kidney function and dose adjustments are critical to prevent toxicity.

Elderly Dosing Considerations

Patients over 65 years old are more sensitive to gabapentin side effects, particularly dizziness, drowsiness, and falls. Recommended adjustments: Start with 100-200 mg once daily (instead of 300 mg). Increase more slowly (increase every 5-7 days instead of 2-3 days). Target lower maintenance doses (typically 600-1200 mg daily instead of 1800-3600 mg). Monitor closely for sedation, confusion, and fall risk. Our calculator automatically applies a 20% dose reduction for patients over 65.

How to Take Gabapentin Correctly

Take gabapentin exactly as prescribed. For three times daily dosing, space doses evenly (every 8 hours). For once-daily dosing (RLS), take at bedtime to minimize daytime drowsiness. Can take with or without food — taking with food may reduce stomach upset. Swallow capsules whole; do not crush or chew. If you miss a dose, take it as soon as you remember. If it's almost time for your next dose, skip the missed dose. Do NOT double up. Never stop gabapentin suddenly — this can cause withdrawal symptoms including anxiety, insomnia, nausea, and seizures. Always taper off under medical supervision over 1-2 weeks.

Common Side Effects and Management

Common (10-30% of patients): Dizziness (most common, usually improves in 1-2 weeks), drowsiness/sedation (take at bedtime initially), fatigue, coordination problems (avoid driving until you know how it affects you), weight gain (5-10 lbs average, monitor diet), swelling in hands/feet (report if severe).
Less Common (1-10%): Dry mouth, blurred vision, nausea, diarrhea, constipation, back pain.
Serious (rare): Mood changes (depression, anxiety, agitation), suicidal thoughts (seek help immediately), severe allergic reaction (rash, hives, difficulty breathing), multiorgan hypersensitivity (fever, rash, swollen lymph nodes).

Frequently Asked Questions About Gabapentin Dosage

Why 100,000+ Patients Trust This Gabapentin Calculator

This gabapentin dosage calculator 2026 is built using FDA prescribing information and neurology guidelines. Over 100,000 patients and healthcare providers use it to verify prescribed doses, plan titration schedules, and ensure medication safety. No sign-up, completely free, and updated monthly. Always confirm with your healthcare provider and never change medication doses without medical supervision.

Medical Disclaimer: This gabapentin dosage calculator provides estimates for educational purposes only. Always follow your healthcare provider's instructions. Do NOT stop gabapentin suddenly — taper off under medical supervision. If you experience severe side effects, seek emergency care immediately.