Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice. Combiflam
can be given in adequate dose, that's not the issue. But question is what your 4 month old child suffered from. I suspect it's dislocation of shoulder joint.
You should see an orthopedician who will easily solve this problem and suppressing pain with combiflam can only add to the problem.
Hope I have answered your query. Let me know if I can assist you further.
Dr. Anoop Kumar Diwan