Extreme hunger and shaking. take lots of antidepressants including lexapro, xanax and effexor (venlafaxine) . could this be the cause?

Possibly: It may also be low glucose levels, dehydration among others. Medications have several side effects, and unless you really need to take three different medications, it may be useful to have a physician titrate the medication to limit it to only the ones that work best for you.

Maybe: Anxiety can also cause these symptoms, but so can these medications. Sometimes such side effects are very transient. Lexapro and Effexor (venlafaxine) can sometimes cause a tremor. But i wonder if xanax withdrawals are causing the shaking. If so, it is important to contact your doctor soon, and immediately if shaking with sweats and anxiety happens again.