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
gtt - Gutta
drops
h, hr - hora - hour
h.s - hour sleep or half-strength
h.s. - Hora Somni
at bedtime
HS - Half Strength
IJ, inj - injectio - injection
IM - intramuscular
with respect to injections
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