A Pharmacist fills orders for prescription medications and instructs patients on how to take them. They may work in community or hospital pharmacies, universities, prisons, or for pharmaceutical companies. Pharmacists are responsible for monitoring patient prescriptions to ensure there are no drug interactions or other impacts on existing conditions. They inform patients of potential side effects and may offer immunizations, and should also be aware of the potential for prescription drug abuse. Pharmacists also need to understand insurance coding and how to process claims for patients. Outside of a pharmacy, they may work in other healthcare locations providing patients with medicinal and wellness information.