When i should notive depot reduction?

Hi i went from 50mg to 100mg haldol depot back to 50mg. I took 100mgs for like 3 months and now im first month back on 50mg and just had my jab. How much time does it get to notice depot reduction dosage effects?

I’m sure it varies from person to person but I would guess within a week or two.

On pills it takes weeks, but how about depot that lasts months?