A pharmacist's main duty includes preparing what?

The primary responsibility of a pharmacist is preparing pharmacy labels, which are essential for ensuring that medications are properly identified and administered according to a patient's prescription. These labels provide crucial information, including the patient's name, medication name, dosage instructions, and any special considerations or warnings. This function is vital for medication safety and compliance, helping to minimize the risk of medication errors and ensuring patients understand how to take their medications correctly.

While the other options involve important tasks within healthcare, they are not the central duties of a pharmacist. Medical charts pertain to the broader healthcare documentation managed by healthcare providers, patient insurance claims involve billing processes generally handled by administrative staff, and healthcare guidelines are developed by regulatory agencies or professional organizations rather than being the specific focus of a pharmacist's role.