How Long Should Fulnite, Alprax And Feliz Be Taken After Relieving Of Symptoms?

My father, age 66 is taking Fulnite-2(1/2) tablet, ALPRAX 0.5(1 tablet), FELIZ-s-5(1 Tablet). since 50 days he had got hyperthyroidism(TSH=0.06) before that and had gone to a psychiatrist who had prescribed the above medicines. He is completely fine now and month back his TSH had come in normal range>2. He had a bypass 6yrs back and was diognosed with Idiopathic Pulmanotory fibrosis. How long should he continue these medicines the doctors next app.is after 70 days. I am worried about the side effects. Pl. guide