IRCC will not consider any other doc consideration or treatment other than those nominated by them. So even though your family doc keep on saying anything they won't consider it. Moreover there is more likely the case that you had to take treatment in Canada and not in your home country. By the way if you don't mind sharing which country are you applying from?i visited our fam doctor, she advise to start the treatment. is the embassy will consider the start of treatment or i need to wait for the sputum and rpt xray.