The term 'SMALL DOSE' can be broken down into two crossword solutions: MED (3 letters) and DROP (4 letters). MED is an abbreviation for medical, which is the field of study and practice that deals with the diagnosis, treatment, and prevention of disease. A DROP is a SMALL amount of liquid, usually measured in milliliters. Therefore, a SMALL DOSE is a SMALL amount of medicine or liquid that is prescribed by a doctor or other medical professional.