Final answer:
The technician should notify the pharmacist if the fill list includes both enalapril and lisinopril, as these similar ACE inhibitor medications usually should not be prescribed together.
Step-by-step explanation:
When filling an inpatient's medication drawer, if the technician notices that the fill list contains both enalapril and lisinopril, which are both medications belonging to the class of drugs known as angiotensin-converting enzyme (ACE) inhibitors (including others such as benazepril, captopril, fosinopril, moexipril, and perindopril), the correct action to take is to notify the pharmacist. It is important to clarify the prescription, as these medications typically should not be used together due to their similar effects, and this could be a potential error or oversight. The pharmacist can then check the prescription, consult with the healthcare provider if necessary, and ensure that the patient receives the correct medication(s).