Transitioning from Gabapentin to Pregabalin

Conversion Approaches

The Mayo Clinic recommends a gradual transition method, administering 50% of the original gabapentin dose plus 50% of the target pregabalin dose for 4 days, for patients who are sensitive to medication changes or at risk for breakthrough symptoms 1, 2

The Mayo Clinic suggests starting pregabalin with 50 mg three times daily or 75 mg twice daily, and for patients transitioning from higher gabapentin doses, consider starting at 150 mg/day in 2-3 divided doses 1, 2
Increase pregabalin dose to 300 mg/day after 3-7 days, then by 150 mg/day every 3-7 days as tolerated, with a maximum recommended dose of 600 mg/day (200 mg three times daily or 300 mg twice daily) 1, 2
Higher pregabalin doses (>300 mg/day) are not consistently more effective but have more adverse effects 2

Both medications require dosage reduction in patients with renal insufficiency, and adjust dosages according to creatinine clearance for both medications 1, 2
Pregabalin has linear pharmacokinetics, making dosing more straightforward than gabapentin's nonlinear kinetics, and may provide analgesia more quickly than gabapentin due to more efficient GI absorption 2, 3
An adequate trial of pregabalin requires approximately 4 weeks, compared to 2 months or more for gabapentin 1, 2

Avoid abrupt discontinuation of either medication in patients who have been on high doses for extended periods 2

The American Geriatrics Society recommends monitoring for common adverse effects such as somnolence, dizziness, and mental confusion during the transition period 4, 5