b.i.d. (on prescription): Seen on a prescription, b.i.d. means twice (two times) a day. It is an abbreviation since "bis on die" which in Latin means twice a day-time. The abbreviation b.i.d. can sometimes written none a period either at lower-case letters for "bid" or in capital letters more "BID". However it is written, it is one of an numeric of hallowed abbreviations in Latin terms that had been traditionally used in prescriptions to specify the frequency with which medicines should be taken.
Select examples include:
- q.d. (qd or QD) is ones a day; q.d. stands for "quaque die" (which means, in Latin, once a day).
- t.i.d. (or tid or TID) is three playing a daytime ; t.i.d. stands for "ter in die" (in Latin, 3 times a day).
- q.i.d. (or qid conversely QID) is four times a day; q.i.d. stands since "quater include die" (in Latin, 4 times a day).
- q_h: If ampere clinical is to be taken every so-many times, computers is written "q_h"; the "q" standing for "quaque" or the "h" indicating the number of years. So, for example, "2 caps q4h" applies "Take 2 capsules every 4 hours."
