We Are Living In A Village. My Baby Just Completed

We are living in a village. My baby just completed 7th months. He is having cold, fever and running loose green stool.
our area CP recommended to take medicines.
Febrex plus - 4ml - (Chlorpheniramine maleate 5 MG+Paracetamol 125 MG+Phenylephrine 1 MG)
coligyl - 4ml twice a day
econorm - 1/2 sachet twice a day.

After having febrex plus he keeps on vomiting... Hence, we started P-125 as alternate.