Answer:
The recipe states: "medicated cream ad lib".
Step-by-step explanation:
Ad lib is an abbreviation of the Latin phrase "ad libitum", which means "as you wish", "at your pleasure". This abbreviation is placed on medical prescriptions, when the patient can use a particular product as desired. In the case of the above question, the doctor has allowed the patient to use a medicated cream as the patient wishes and finds necessary. For this reason, the medical prescription should indicate: "medicated cream ad lib".