What Is The Dosage Of Serratiopeptidase To Be Administered In A Child?

hello, i am a layman from Pakistan. to cut short , my 6yrs old child has cough, cold fever occasionally for the last 3 months. He got better with the medicines but after that again cough, fever etc. But his nose has fluid all the time. 10 days ago he has ear pain. the doctor give him ear drops, antibiotics etc & yeterday he made the ear clear by removing the wax in the ear. Now doctor has prescribed him Serratiopeptidase 5md 20 tabs, 3 times a day & said that there is an infection between his ear & nose tube which is causing the whole ENT problems. I just want to ask shall I give it to my 6 yrs child. If yes, that how many times a day ? my email is YYYY@YYYY