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q.d. (qd or QD) is once a day; q.d. stands for "quaquedie" (which means, in Latin, once a day). t.i.d. (or tid or TID) isthree times a day ; t.i.d. stands for "ter in die" (inLatin, 3 times a day).
Moreover, does 3 times a day mean every 8 hours?
When the drug facts label on the medicine says to giveit “every 6 hours,” that generallymeans the medicine is taken 4 times a day (forexample, at breakfast, lunch, supper, and bedtime). “Takeevery 8 hours” generally means the medicineshould be taken 3 times a day.
| Abbrev. | Meaning | Latin (or New Latin) origin |
|---|---|---|
| q.d., qd | every day / daily | quaque die |
| q.h.s., qhs | every night at bedtime | quaque hora somni |
| q.d.s, qds, QDS | 4 times a day | quater die sumendum |
| q.i.d, qid | 4 times a day | quater in die |
Similarly one may ask, is TID every 8 hours?
q8H means every 8 hours.This is not the same asthree times a day (tid or TD). q12H meansevery 12 hours.
stands for "quaque die" (which means, in Latin, once aday). b.i.d. (or bid or BID) is two times a day;b.i.d. stands for "bis in die" (in Latin, 2 times a day).t.i.d. (or tid or TID) is three times a day ;t.i.d.