I can only speak from experience. I took an antidepressant alongside an antipsychotic some years back and I didn’t feel like or come across as a “zombie”. Antipsychotics are prescribed for all kinds of conditions besides the obvious but (for me) the word “antipsychotic” scared me and made me think “do THEY think I’m psychotic?” – they didn’t. Unfortunately this combination while not doing me any harm didn’t have much impact on OCD. I’m pretty cynical about the medical profession but know quite a few people who’ve benefited from medication/therapy or therapy alone.