The term MEDICINAL AMOUNT can be broken down into two crossword solutions: DOSE (4 letters) and DOSAGE (6 letters). DOSE is a noun that refers to the amount of medicine or drug taken at one time, while DOSAGE is a noun that refers to the strength or amount of a medicine or drug prescribed for a single DOSE. Both terms are used in the medical field to refer to the amount of a medicine or drug that is given to a patient.