KatCar, May I ask WHY the doctor is weaning you off of the xanax already? The reason I ask, is because most doctors will prescribe and anti-anxiety med, along with the SSRI in the beginning, BECAUSE of the start up side effects.
One of the main start up side effects of ALL ssri's, is increased anxiety/panic, stomach upset, jitters, etc... I can almost guarantee that's why you have the jitters and stuff. So i'm not totally understanding WHY you would be going off of it already.
SSRI's tend to take anywhere from 6-8 weeks to be fully effective, but each time you increase the dosage, alot of the side effects return until your body adjusts to even more of the med, and then you're waiting for another 6-8 weeks for that dosage to settle.
Please don't be afraid to use the xanax if you need it, you're on such a small dose now as it is.
I just started taking Zoloft again about 2 months ago (was on it 3 times before, and paxil once) AND I take .5 mgs of xanax twice a day, sometimes 3 times if i'm having a really bad day. My doc and pharmacist both told me that I take a low dosage, and that i'm not going to have a hard time coming off of it. My pharmacist says some people take up to 10 mgs a day! She said that anything over 3 mgs daily is when people start having a hard time getting off of it.
Best wishes to you in whatever you decide, but IMHO I would tend to up the xanax to the whole .25 2-3 times a day like you were taking it, at least until you're good on the Lexapro. Take care! ((hugs)) Fox