I started on 25mg at night for migraine prevention & tolerated that well for the first week. However, when I began 25mg in the morning as well (50mg daily total) I became spaced out, forgetting words, vacant, disorientated, headache. I work as a Health Professional so need my head fully focused. Do these side effects wear off if I persevere or should I just cut back to 25mg? Is 25mg enough to prevent migraines? Mine weren't that frequent ( every couple of weeks) but they were debilitating to extent I'd need time off work & they'd last 3/4 days & triptans didn't ease the pain. Also is alcohol a complete no no or are a couple of drinks ok?