advice regarding meds and side effects

Hi people,

Right now three years with dp after bad trip xtc. My meds are stable now for two years: 150 mg lyrica, 100 mg lamictal and 20 mg prozac.

I want to move on to duo-medication therapy. So my question which one would you choose to wear off?

(at this point only had bad to no advice from psychiatrists)

Side effects for me important in the following rank: 1. libido 2. memory/brain 3. emotional flatness.

Thanks!