q_h (on prescription)
If a medicine is to be taken every so- many hours, it is written "q_h"; the "q" standing for the Latin word for once "quaque" and the "h" indicating the number of hours. So, for example, "2 caps q4h" means "Take 2 capsules every 4 hours." However it is written, it is one of a number of hallowed abbreviations of Latin terms that have been traditionally used in prescriptions to specify the frequency with which medicines should be taken. Other examples include: {{}}q.d. (qd or QD) is once a day; q.d. stands for "quaque die" (which means, in Latin, once a day). b.i.d. (bid or BID) is twice a day; b.i.d. stands for "bis in die" (which means twice a day). t.i.d. (or tid or TID) is three times a day ; t.i.d. stands for "ter in die" (in Latin, 3 times a day). q.i.d. (or qid or QID) is four times a day; q.i.d. stands for "quater in die" (in Latin, 4 times a day).

Medical dictionary. 2011.

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  • bid (on prescription) — Seen on a prescription, bid means twice (two times) a day. It is an abbreviation for bis in die which in Latin means twice a day. The abbreviation bid is sometimes written without a period either in lower case letters as bid or in capital letters …   Medical dictionary

  • qd (on prescription) — Seen on a prescription, qd (or, written with periods, q.d.) means one a day (from the Latin quaque die). The abbreviation is sometimes written without a period in capital letters as QD . However it is written, it is one of a number of hallowed… …   Medical dictionary

  • qid (on prescription) — Seen on a prescription, qid (or q.i.d.) means 4 times a day (from the Latin quater in die). The abbreviation qid or q.i.d. is also sometimes written without a period in capital letters as “QID”. However it is written, it is one of a… …   Medical dictionary

  • tid (on prescription) — Seen on a prescription, tid means three times a day. It is an abbreviation for ter in die which in Latin means three times a day. The abbreviation tid is sometimes written without a period either in lower case letters as tid or in capital letters …   Medical dictionary

  • Quaque (on prescription) — If a medicine is to be taken every so many hours, it is written q h ; the q standing for the Latin word for once quaque and the h indicating the number of hours. So, for example, 2 caps q4h means Take 2 capsules every 4 hours. However it is… …   Medical dictionary

  • b.i.d. (on prescription) — Seen on a prescription, b.i.d. means twice (two times) a day. It is an abbreviation for bis in die which in Latin means twice a day. The abbreviation b.i.d. is sometimes written without a period either in lower case letters as bid or in capital… …   Medical dictionary

  • bis in die (on prescription) — Seen on a prescription, bid means twice (two times) a day. It is an abbreviation for bis in die which in Latin means twice a day. The abbreviation bid is sometimes written without a period either in lower case letters as bid or in capital letters …   Medical dictionary

  • q.d. (on prescription) — Seen on a prescription, q.d. (or qd) means one a day (from the Latin quaque die). The abbreviation is sometimes written without a period in capital letters as QD . However it is written, it is one of a number of hallowed abbreviations of Latin… …   Medical dictionary

  • q.h. (on prescription) — Abbreviation for "every hour." On a prescription or doctor s hospital orders, q.h. means every hour. Also written qh (without the periods). From the Latin quaque meaning once + h for hour. However it is written, it is one of a number of …   Medical dictionary

  • q.i.d. (on prescription) — Seen on a prescription, q.i.d. (or qid) means 4 times a day (from the Latin quater in die). The abbreviation q.i.d. is also sometimes written without a period in capital letters as “QID”. However it is written, it is one of a number of hallowed… …   Medical dictionary

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