The issue is whether or not your wife has some say with respect to the legal and physiacl custody of your child. if she is still deemed the legal and physical guardian of the minor child and she has not given up any parental rights over him, then under the law she was entitled to take the child to a health care professional for evaluation and treatment where changes in medicine were done.In hindsight, it would have been a good idea for her to have advise you beforehand of what she was going to do.