If you are referring to taking medication every 12 hours, I would think "twice a day" or "bidaily" would be sufficient expressions in a medical setting. Some prescribers prefer to write q12h for "every twelve hours."
q 90 min means every one and a half hours.
q stands for quaque, meaning every in Latin. qd is every day, q4h is every four hours, etc.
q2h means every 2 hours.Every 2 hours
The medical abbreviation for every four hours is q4h.q4h
Nothing by mouth every four hours is a rather nonsensical instruction, but if you were inclined to write and abbreviate it, it would be written "NPO q4h."
Take 1 tab po q12 h
3/day or 3xdayThree times daily is abbreviated TID or t.i.d.
The medical abbreviation for six times per day is q6h, which stands for "every 6 hours." This term is commonly used in medical prescriptions to indicate the frequency of medication dosing.
every four hours
Passes every minute, 60 minutes in an hour, 24 hours in a day so, 60x24 = 1440 It passes the twelve 1440 times in 24 hours.
because of the sun,moon,gravity and the rotation
Twelve hours