Question

What is diffrence between od and bd in medical term?

Answer 1

in short,

OB: Organisation Block

DB: Data Block

od is wrong written the right one is OB

Answer 2

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$\mathfrak{\green{Answer.}}$ bd means twice (two times) a day. It is an abbreviation for "bis in die" which in Latin means twice a day. ... However it is written, it is one of a number of allowed abbreviations of Latin terms that have been traditionally used in prescriptions to specify the frequency with which medicines should be taken.
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