Which of the following is NOT typically responsible for obtaining information on drugs used by a patient?

The role of a medical assistant typically involves supporting healthcare providers in clinical environments and performing administrative as well as certain clinical tasks. While medical assistants may gather some basic information from patients, they are not primarily tasked with obtaining detailed and specific information regarding the medications a patient is currently using. This role is more rigorously handled by healthcare professionals who specialize in monitoring and understanding drug therapy, such as nurses, pharmacists, and physicians.

Nurses are trained to assess patients’ medical histories, including their medications; pharmacists are the medication experts responsible for understanding drug interactions and proper usage; and physicians must be aware of their patients' medications to provide effective medical care. Therefore, the medical assistant's role in obtaining detailed medication histories is limited compared to the other professionals mentioned, making it the one that is not typically responsible for this important task.