Welcome to HCM .
Ascazinc syp contains zinc sulphate which is usually prescribed in diarrhoea
or respiratory illnesses for faster recovery.
However it might cause abdominal discomfort as a sideffect . Also for a 6 month baby the dose might need adjustment as per weight of the baby ( usually 20 mg / day in two to three divided doses.
Talk to your pediatrician
for dose adjustment or an alternative formulation like zinconia , Z&D etc.
Do not stop any drug without consulting your doctor .
Wishing your baby good health.