Nurse Practitioner prescribed medications to child in wrong person's name on purpose without seeing the child.

A friend of mine is dealing with a difficult co-parenting situation. Her ex husband is now engaged to a nurse practitioner that prescribed medication to my friends 5 year old son for an allergic reaction without actually seeing him in person. Then, she (ex husbands fiance) also prescribed the medication in the ex husband's name to give to the kid. The medication in question is antibiotics and steroids so nothing too serious.

How illegal is this? What should my friend do?