QID= 0900, 1300, 1700, 2100
Routine Q4h= either 0900, 1300, 1700, 2100, 0100, 0500
or 0800, 1200, 1600, 2000, 0000 (MN) 0400
Routine Q 6h = either 0400, 1000, 1600, 2200
or 0000, 0600, 1200, 1800
These were set by a Nursing/Pharmacy committee. They were pretty strict with setting the times, and the computer would automatically pick the closest one to say the last dose of IV abx. If it had been given in PACU at 0100 for example, the computer would pick the 12-6-12-6 form.
As far as med pass you had 45 min before and 45 min after the set time as leeway.
1000 on my unit would have been nice for the nurses, but wouldn't have worked because patients would be getting PT or OT right after breakfast.
I do recomment the SET times rather than every nurse choosing what time she wants.