Final answer:
The abbreviation 'Rx' is used for the placement of the word 'prescription' in a patient's chart. It is a symbol derived from Latin that denotes a medication order, such as the prescription for amoxicillin given to Barbara for her pneumonia treatment.
Step-by-step explanation:
The abbreviation used for placement of the word prescription in a patient's chart is Rx. This symbol originates from the Latin word recipe, which means 'to take.' It is widely recognized in the medical field and is used by healthcare providers when writing prescriptions. For example, after diagnosing Barbara with pneumonia, the Physician Assistant (PA) would write Rx for amoxicillin on her chart. Amoxicillin is a commonly prescribed antibiotic in the penicillin group of drugs that is used to treat various bacterial infections, including pneumonia. Despite completing her course of amoxicillin, Barbara's return for a follow-up indicates that her recovery may require further medical evaluation and possibly an alternative treatment approach.