An adjustment period happens with most meds. Especially psych meds.
When I was on risperidone, I was quite zonked for a couple of days every dosage change. My most concerning side effect was lactation when I reached what for me was supposed to be a therapeutic dose. That may not happen to you, but to me it made things worse. That stopped when I insisted on a med change. Most anti psychotics have a sedating effect, which is why they generally tell you to take them at night. There are others, that are less sedating, but there is no guarantee they will work for you. If you are still struggling with lethargy after a fortnight to a month, I'd ask about different meds. But the sleepiness should pass. Give it some time for your body to get used to it.
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