Gabapentin Dosing for Radiculopathy

Initial Dosing and Titration

The American Academy of Neurology recommends starting with 100-300 mg at bedtime or 100-300 mg three times daily, with gradual titration up to 1800-3600 mg/day in divided doses over several weeks, as tolerated, according to the Mayo Clinic Proceedings 2
Increase by 100-300 mg every 1-7 days as tolerated, with a maximum daily dose of 3600 mg/day in three divided doses, as suggested by the Mayo Clinic Proceedings 2
Titrate until adequate pain relief is achieved or dose-limiting side effects occur, as recommended by the Praxis Medical Insights 1

Studies suggest that lumbosacral radiculopathy may be relatively refractory to first-line medications compared to other neuropathic pain conditions, with moderate evidence, according to the Mayo Clinic Proceedings 3

An adequate trial requires 3-8 weeks for titration plus 2 weeks at maximum dose, as recommended by the Mayo Clinic Proceedings 2

For elderly patients, consider lower starting doses and slower titration due to potential decreased renal function, as recommended by the Praxis Medical Insights 1

Common side effects include dizziness, somnolence, dry mouth, and constipation, with high evidence, according to Ophthalmology 5
Side effects can be minimized by starting with lower dosages and titrating cautiously, as recommended by the Praxis Medical Insights 1

Pregabalin starting dose is 50 mg three times daily or 75 mg twice daily, with titration up to 600 mg/day, as recommended by the Praxis Medical Insights 6