tokens: The most common adverse events ( incidence > or = 5 % in one group ) after rizatriptan and ergotamine / caffeine , respectively , were dizziness ( 6 . 7 and 5 . 3 % ) , nausea ( 4 . 2 and 8 . 5 % ) and somnolence ( 5 . 5 and 2 . 3 % ) .