They are directions indicating how many times per day the dose should be administered. It goes like this:
SID or QD = Once a day
BID = Twice a day
TID = Three times a day
QID = Four times a day
However, The Joint Commission which acredits hospitals and nursing homes has recommended that these abbreviations be discontinued because they lead to errors in dosing. Now, physicians must write out the words, "once a day," "twice a day" and so on.
qid four times daily
bid twice daily
tid three times daily
OS in left eye (oculo sinister)
Oh and another one is QOD = Every Other Day :)
qid - 4 times daily
ud - as directed
od - right eye
ou - both eyes
os - left eye
sq - subcutaneous (for injectables)
It probably says bid which stands for twice daily, or qid which stands for three times daily. PID stands for pelvic inflammatory disease.
q6h stand for every 6 hours, q=every and h=hours so you can also take it to mean qid or four times daily though the doses should be about 6 hours apart.
hi there its the same, i.e. bid=q12h tid=q8h qid=q6h
2 + 12 = 14 2/14 = 0.14 0.14 x 25= 3.5 mg
PID is not an abbreviation in common usage for prescriptions. BID means twice daily, TID means three times daily, QID means four times daily, and PRN means "as needed".
2 tablets should be given per dose. If its 100-mg and you need 800-mg a day and you are to take it four times a day (qid) then each dose should be 2 100mg tablets
Vital signs qid is an instruction to check vital signs four times daily.
qid x10 days means four times daily for ten days.
Amb resident qid means the resident should be assisted to walk four times a day.
2 puffs qid ud means 2 puffs four times daily as needed.
No. Four times per day is qid. (3x/day is tid; 2x/day is bid; 1x/day is qd.) q4d would mean every four days, I suppose.
On a prescription, q.i.d. is the abbreviation for the Latin quater in die and means four times a day.