Non nursing Dx

Hello all,

I have a question about a nursing note I placed in my charting and was reprimanded for it and was told that I didn't have the scope of practice to make this note b/c it is considered a Doctor's diagnoses. Can anyone tell me if the following note is a nursing dx or not?

Here goes: "Resident is at risk for developing tolerance to medication as evidenced by agitated behavior for longer periods of time after medication was administered"

I am thinking I was supposed to say, "knowledge deficit re: medication" but the patient is cognitively impaired and does not communicate so pt. has no knowledge per se.

thanks in advance for any input you can give me on this.