Hello, 1. Although it is common in children between 2 and 6 years as their appetite fluctuates in accordance with their age and energy levels, but if you notice that loss of appetite is accompanied with weight loss also then consult a Pediatrician immediately to identify the cause and correct it. PS. at his age common causes to look out for are anemia, intestinal worms, and constipation since they are preventable with some extra care and attention. 2. Make sure to exclude temporary causes of loss of appetite like teething, sore throat, growth changes, till then keep following things in mind: . feeding tests the patience of the mother, but it is the most important part of treatment. . small feeds every 1/2 hour. . undiluted milk thickened with 1 tablespoon of skimmed milk powder. . gradually increased solid foods like potato, mashed banana, sweet potato, pulses. . minimum handling of the baby. . multivitamin syrup: 10 drops twice daily. As you are under the observation of physician, thus remain under his regular supervision as babies are delicate and can get worse with infection, also Longifene [Buclizine] is given in motion sickness, allergy and vertigo and sleepiness is the major side effect of the drug, so do not stop/start the medicine without first consulting with your physician. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Munish Sood