What do systematic reviews say?

CHLORPROMAZINE LOW DOSE (≤ 400 mg/day) vs MEDIUM DOSE (401 mg/day to 800 mg/day)

It is very uncertain whether CHLORPROMAZINE LOW DOSE (≤ 400 mg/day) changes global state: no improvement ‐ short term compared with MEDIUM DOSE (401 mg/day to 800 mg/day) (very low certainty).

• Chlorpromazine dose for people with schizophrenia 2017 · Cochrane Headline outcomes only
  RR 0.83 [0.28, 2.44]
  1 study · 60 participants
  Very low