From: Opioid analgesics increase incidence of somnolence and dizziness as adverse effects of pregabalin: a retrospective study
First onset date of adverse effects
N (% of adverse effect developed patients)
≤2 weeks
46 (73.0Â %)
>2 weeks–≤1 month
9 (14.3Â %)
>1 month–≤2 months
1 (1.6Â %)
>2Â months
7 (11.1Â %)