Nursing: Ch.3 Medical Math || with 100% Error-free
Solutions.
ac correct answers meaning: before meal
Latin: ante cibum
sample time: 7:30 AM, 11:30 AM, 4:30 PM
pc correct answers meaning: after meals
Latin: post cibum
sample time: 10 AM, 2 PM, 6 PM
daily correct answers meaning: each day, daily
Latin: quaque die
sample time: 10 AM
do not use: q.d. or qd
bid correct answers meaning: twice a day
Latin: bis in die
sample time: 10 AM, 6 PM OR 9 AM, 9 PM
tid correct answers meaning: three times a day
Latin: ter in die
sample time: 10 AM, 2 PM, 6 PM OR 8 AM, 4 PM, 12 AM
qid correct answers meaning: four times a day
Latin: quarter in die
sample time: 10 AM, 2 PM, 6 PM, 10 PM OR 6 AM, 12 PM, 6 PM, 12 AM
qh correct answers meaning: every hour
Latin: quaque hora
sample time: because the drug is given every hour, it will be given 24 times in 1 day
at bedtime correct answers meaning: at bedtime, hour of sleep
Latin: hora somni
sample time: 10 PM
do not use: hs, h.s.
qn correct answers meaning: every night
Latin: quaque nocte
sample time: 10 PM
stat correct answers meaning: immediately
Latin: statim
sample time: NOW!
, q2h or q2° correct answers meaning: every 2 hours
explanation: the drug will be given 12 times in a 24-hour period (24/2)
sample times: even hours at 2 AM, 4 AM...10 PM, 12 midnight
q4h or q4° correct answers meaning: every 4 hours
explanation: the drug will be given six times in a 24-hour period (24/4)
sample times: 2 AM, 6AM, 10 AM, 2 PM, 6 PM, 10 PM
q6h or q6° correct answers meaning: every six hours
explanation: the drug will be given four times in a 24-hour period (24/6)
sample times: 6 AM, 12 noon, 6 PM, 12 midnight
q8h or q8° correct answers meaning: every 8 hours
explanation: the drug will be given 3 times in a 24-hour period (24/8)
sample times: 6 AM, 2 PM, 10 PM
q12h or q12° correct answers meaning: every 12 hours
explanation: the drug will be given twice in a 24-hour period (24/12)
sample times: 6 AM, 6 PM
every other day correct answers meaning: every other day
latin: quaque otra die
explanation: this abbreviation is interpreted by the days of the *month*
sample time: The nurse writes on the meidcation record "odd days of the month" - 10 AM on the
first, third, fifth day and so on. OR the nurse may write "even days of the month" - 10 AM on the
second, fourth, sixth day, and so
Do not use: qod, q.o.d
prn correct answers meaning: as needed
latin: pro re nata
*explanation: this abbreviation is usually combined with a time abbreviation*
EX: q4h prn (every 4 hours as needed). This permits the nurse to assess the patient and make a
nursing judgement about whether to administer the medication.
EX: acetaminophen 650 mg po q4h prn (650 milligrams acetaminophen by mouth, every 4 hours
as needed for pain). The nurse assesses the patient for pain every 4 hours. If the patient has pain,
the nurse may administer the drug. This abreviation has three administration implications:
1. The nurse *must wait* 4 hours before giving the next dose
2. Once 4 hours have elapsed, the dose may be given any time thereafter.
3. Sample times not given because nurse does not know when the patient will need the drug
3 times weekly correct answers meaning: three times per week
latin: ter in vicis
explanation: time relates to days of the *week*. Do not confuse with tid (three times per *day*)
sample time: 10 AM on Monday, Wednesday, Friday
do not use: tiw or t.i.w
