Pregabalin to Gabapentin Conversion

Introduction to Conversion

The recommended conversion ratio when transitioning from pregabalin to gabapentin is approximately 1:6, meaning 1 mg of pregabalin is roughly equivalent to 6 mg of gabapentin 1

When converting from pregabalin to gabapentin, a gradual transition is recommended to minimize breakthrough symptoms and adverse effects 1
The Mayo Clinic recommends a transition method using 50% of the original pregabalin dose plus 50% of the target gabapentin dose for 4 days, especially for patients sensitive to medication changes 1

Due to gabapentin's nonlinear pharmacokinetics, higher doses may have decreased bioavailability compared to pregabatin's linear pharmacokinetics 1
Pregabalin has a more rapid onset of action due to more efficient gastrointestinal absorption 1
Gabapentin requires a longer titration period (approximately 2 months) compared to pregabalin (approximately 4 weeks) to reach therapeutic effect 1
Both medications require dosage adjustments in patients with renal insufficiency 1

Divide the total daily gabapentin dose into three times daily dosing due to its shorter half-life 2
For neuropathic pain management, gabapentin doses typically range from 100-1200 mg three times daily 2

Monitor for breakthrough pain during the transition period, as gabapentin may take longer to reach full therapeutic effect 1

Avoid abrupt discontinuation of pregabalin in patients who have been on high doses for extended periods 1