Hello Suvarna, Welcome to HCM. First about medicines: Modalert is a psychostimulant. It is usually given to increase the alertness (in simple terms). Sizodone is an antipsychotic. Clonotril is anti-anxiety medicine. Coming to your queries, These tablets are not given for depression but for psychotic mental illnesses. The symptoms which you have mentioned like aggressiveness, anxiety and connecting to different topics suggest some mental illness in him. The drugs are essential for him if the diagnosis is correct. you must visit a psychiatrist for proper evaluation. If he does not wish to take tablets, he can be given sizodone syrup but under doctor s supervision. Hope this helps you. Thanks.