Well, I'm on Lexapro and I personally think it's ok to use certain recreational substances BUT...since you are on Lexapro as you say to HEAL from past drug use your really probably should not use drugs if that's your purpose.
It's NOT why I take Lexapro so I feel it's ok for me to sometimes use SOME drugs.
I sometimes use Phenibut, Weed, had used Kratom before the ban, alcohol, and a few others and I don't feel like my medication doesn't work because I use those things, just being honest.
AVOID at all costs a whole number of things like: DXM, MDMA, MDA, ANY and all MAOIs, a large percentage of Serotonin releasers, and a number of other drugs.
But I think MOST psychedelics are USUALLY ok as long as they aren't heavy serotonin releasers, weed is fine, nitrous is fine, I wouldn't strongly advise you to use much alcohol but i can get away with it.
Those are only some answers.
Just be SMART.