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Medicine vocabulary · Prescriptions and Medication

Twice daily

Meaning in medicine, with examples

phraseCommon term

In medicine, twice daily means: Taken or given two times every day, usually in the morning and evening; one of the standard ways of writing how often a medicine is used.

In Turkish: günde iki kez, günde iki defa

How it is used

On prescriptions it is written BD (UK, from Latin 'bis die') or BID (US). Related forms are once daily (OD) and three times daily (TDS or TID).

Example sentences

  1. Take one tablet twice daily with food.

  2. Let's increase the metformin to 1 g twice daily.

Common collocations

  • twice daily with food
  • once daily
  • three times daily
  • twice-daily dosing
  • doseThe amount of a medicine taken or given at one time, for example 500 mg, often stated together with how often it is taken.
  • prescriptionA doctor's written or electronic instruction saying which medicine a patient should get, how much, how often and for how long.
  • PRNShort for the Latin 'pro re nata', meaning 'as needed': a medicine given only when the patient needs it, not at fixed times.
  • statImmediately and without delay; used in orders for a medicine, test or review that must happen right now.

This word in other fields

The same English word can have a different meaning in another field:

More terms: Prescriptions and Medication

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This page explains English vocabulary for learners. It is not medical advice.