Even in modern day and time Roman Numerals are still being used because doctors still use them in prescribing medications and especially when using apothecaries' system of measurement. Now, many prescriptions are being electronically sent, Roman Numerals are not used as often. You will most definitely see Roman Numerals on packaging to designate DEA schedules for controlled substances. So, it is still important to understand what the Roman Numerals stand for. If you plan on going to pharmacy school, Roman Numerals will be brought up once or twice.