Ive been on effexor xr 37.5 for 1 year. It worked wonders for me never had a single panic attack until here recently. The past few weeks ive been having panic attacks while driving. Should i ask for a higher dosage or start using an emergency med for when i have an attack. Keep in mind one morning i took my effexor then fell asleep. When i woke i forgot i had already took it and took another. It was the worst day of my life. I had panic attacks all day.