It impairs judgement, interferes with your ability to react and think and makes it more difficult to focus and sustain attention. Effexor can have terrible withdrawal symptoms, and since it has a short half-life, it is generally not a good idea to take it every other day or every few days as a tapering strategy. Take a lower dose every day consistently so your body has a chance to get used to the change.

Like I am afraid to drive due to antidepressant withdrawal. I've had close calls because I can't sustain attention the way I used to, and it really has me questioning myself, which only makes the anxiety and lack of attention worse.