Table 1.

Characteristics of study population

Demographic factors	N	Median (range)
Male	114 (59.5 %)
Female	81 (41.5 %)
Age		67.0 (20–90)
Dose of pregabalin		Median (range)
Initial dose, mg/day		75 (25–450)
Maintenance dose, mg/day		150 (25–450)
Adverse effects	N
Patients who developed one or both of side effects	63 (32.3 %)
Patients who developed somnolence	47 (24.1 %)
Patients who developed dizziness	34 (17.4 %)