Prescribing refers to recommending or authorizing the use of a particular treatment for a medical condition. The antonyms for the word "prescribing" would, therefore, be terms that suggest disapproving the use or recommendation of a medical treatment. Antonyms for prescribing could include forbidding, prohibiting, discouraging, cautioning, or warning against the use of a particular treatment or medication. Other suitable antonyms could include advising against, dissuading, disapproving, objecting, opposing, or rejecting the use of a particular medical intervention. It is essential to consult a medical professional before making any decisions about medical treatment.