s main effect is on GABA, the same neurotransmitter targeted by your Xanax, which is a target of most drugs for epilepsy.
Topamax is an epilepsy
and migraine headache
drug. So there is some evidence it might boost the effect of the Lexapro. However, let's start with the question, if you're tolerating the Lexapro well, you aren't actually at the recommended dosage for treating depression. You are at the recommended dosage for treating anxiety.