Pronunciation follows convention outside the medical field, in which acronyms are generally pronounced as if they were a word (JAMA, SIDS), initialisms are generally pronounced as individual letters (DNA, SSRI), and abbreviations generally use the expansion (soln.= solution, sup.he prevalent way to represent plurals for medical acronyms and initialisms is simply to affix a lowercase s (no apostrophe). 1  Example: one OCP, two OCPs [oral contraceptive pills].