My 11 Months Old Daughter Was Vomiting Profusely Last Night..atleast

My 11 months old daughter was vomiting profusely last night..atleast 4 times within 3 hours..I gave her neopeptin syrup which didn't work.
Her doctor has advised to give emeset syrup to cure dehydration and vomiting.
Is it safe to give her this medicine are there any side effects of thia medicine..
Although she has stopped vomiting after gave her homwopathy medicine chamomile 6.