Don't use any medication for such a long duration unless prescribed by physician. This cough is not due to use of darolac. Long term use may cause some intestinal upset like gas and bloating
. Maintain good hydration by giving plenty of water and continue feeding. Give syrup Zinc 5 ml once a day for 14 days it will help in both cough and loose motion
. Watch for persistent fever
, blood in stool
, decreased oral intake. If you notice any of these consult your doctor immediately.