<s>[INST] My brother has been prescribed 2mg sizodon to be increased to 4 mg in 2 days, to be taken nightly for a month. he"s also been prescribed parkin. past couple of months he has displayed unusual behavior...he's hyperactive and unable to focus on any one thing...with mood swings. [/INST] HiThanks for using healthcare magicHyperactivity, mood swing, unable to focus, decrease sleep, big talks etc are symptoms of mania and you brother may have manic episode. In that case, initially psychiatrist would try to control him with antipsychotic and if he does  not control with one, then mood stabilizer could be added. Just wait for few days and in case, he does not improve, you can consult his psychiatrist. In case, you need further help, you can ask.Thanks </s>