hi, my son is 5.5 months old , weight 7kg, is vomiting while feeding formula (Nan pro 1) every time. he is extreamly restless during the formula feeding process. Even after proper burp he is vomiting entire milk. Recently 5 days back he caught cold & doc advised Cefoprox, PRATHAM SYR( azithromycin ), Alex, respira syrup. He does not feel hungly even after 4-5 hours. Pls advise.