Hi, Feliz-S 10 tablet contains escitalopram that belongs to the group of antidepressant medications known as selective serotonin reuptake inhibitors or SSRIs is used in the treatment of depression, anxiety, panic disorder, obsessive compulsive disorder etc. Side effects are nausea, vomiting, excessive sweating, fatigue, weakness, tiredness, changes in sleep patterns, diarrhea or constipation, dry mouth, changes in appetite, confusion, decreased urine output, drowsiness, allergic reactions etc. These side effects are mild as well as self limiting and go away over time as the body adjusts to this medication. But if any of these side effects persist for long or bother your son, then you should consult your son s doctor first for medical help. You should remember that your son s doctor is the best judge to choose the best medication for your son. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General And Family Physician