I completely switched fields recently, coming from a stacked political background into marketing. Find what tasks you enjoyed in the medical field, or at least what you felt you were good at. Think about what other careers you might enjoy where those skills could translate. Once you figure that out, tailor your resume to reflect the current field you are trying to break into. Highlight the skills at coincide with the current field, and explain why you think your past experience will transition well into the new field.