You are an assistant tasked with analyzing medical histories to determine which medication is missing from the patient’s current regimen.

<PatientData>
Demographics: {'race': 'White', 'gender': 'MALE', 'year of birth': 1930}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '1993-07-03', 'end datetime': '1993-07-03'}
Measurement 1: {'measurement': 'Non-small cell lung cancer (disorder)', 'measurement type': 'EHR encounter record', 'measurement date': '1993-07-03T00:00:00', 'unit': None, 'value': None}
Current Medications:
Medication 1: {'Drug name': 'Penicillin V Potassium 500 MG', 'Start datetime': '1975-08-30', 'End datetime': '1975-08-30', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 2: {'Drug name': 'Simvastatin 20 MG Oral Tablet', 'Start datetime': '1991-01-04', 'End datetime': '1991-01-04', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
</PatientData>

Based on the EHR history above, which medication **should also be on the list today**?

A. Memantine hydrochloride 2 MG/ML [Namenda]
B. Nitroglycerin 0.4 MG/ACTUAT [Nitrolingual]
C. Astemizole 10 MG Oral Tablet
D. Nexplanon 68 MG Drug Implant
E. Donepezil hydrochloride 10 MG / Memantine hydrochloride 28 MG [Namzaric]

Please share a single capital letter representing your selected answer: 
Memantine hydrochloride 2 MG/ML [Namenda] Nitroglycerin 0.4 MG/ACTUAT [Nitrolingual] Astemizole 10 MG Oral Tablet Nexplanon 68 MG Drug Implant Donepezil hydrochloride 10 MG / Memantine hydrochloride 28 MG [Namzaric]