s.o.s., si op. sit means si opus sit - if there is a need in Prescription
Similar to s.o.s., si op. sit
MS - morphine sulfate�or�magnesium sulfate MSO4 - morphine sulfate N.M.T. - not more than N.T.E. - not to exceed nebul - nebula - a spray noct. - nocte - at night non rep. - non repetatur - no repeats