alt
Alternating
b.i.d
Twice a day
b.i.w
Twice a week
HS
at bedtime
OD or od
Once a day/
daily
q
Every
q8h
Every 8 hours as needed for pain
q6h
Every 6 hours as needed for pain
q12h
Every 12 hours
q.i.d
Four times a day
q.o.d
Every other day
t.i.d
Three times a day
t.i.w
Three times a week
h
hour