dear spandanphysio
I suggest you ask the experts....https://www.cpirf.org/ This research site should be able to tell you more.
AND I would certainly want to ask the doctors concerned! Let them inform you. Let them give you statistics and research information. Do they know what they are doing? and can they inform you and answer your questions?
There are numerous articles about botox, other medication and protocols for treating children with CP. I only know about the situation in Holland and Spain and the ideas differ in both countries.
I personally feel that many doctors are often much too "happy to prescribe" all kinds of medication and a little less happy to educate and explain to parents. You cannot ask enough questions in my opinion. Let them do the work and make sure you know as much as possible. They are prescribing this "poison".... for how long and how often..... they have to "sell you the story and explain why this is the best or only option".
Good luck with your research. Sorry, I cannot answer all your questions.
Esther