What Pharmacists Do. Pharmacists dispense prescription medications to patients and offer expertise in the safe use of prescriptions. They also may provide advice on how to lead a healthy lifestyle, conduct health and wellness screenings, provide immunizations, and oversee the medications given to patients.hey dispense medications to patients and answer any questions that patients may have about prescriptions, over-the-counter medications, or any health concerns that the patient may have. They may also provide some primary care services such as giving flu shots.