Final answer:
Potential barriers in performing MTM include lack of patient engagement, inadequate medication list, limited healthcare access, and short consultation time.
Step-by-step explanation:
Potential barriers that can occur while performing an MTM include lack of patient engagement, inadequate medication list, limited healthcare access, and short consultation time. Lack of patient engagement can hinder the effectiveness of MTM as patients may not fully participate in the process. Inadequate medication list can lead to errors or incomplete information about the patient's medications. Limited healthcare access can prevent patients from receiving necessary care and services. Short consultation time can restrict the depth of discussion and limit the scope of MTM.