Animal Behavior College (ABC) Externship Practice Test

Which abbreviation means 'once daily'?

s.i.d. h.s. gtt tab

Correct Answer:

s.i.d.

Explanation:

In dosing language, abbreviations tell you how often to give a medication. Once daily is expressed as semel in die, and the abbreviation for that is s.i.d., meaning one dose per 24 hours. The other options refer to when or in what form the medicine is given: h.s. means at bedtime, gtt stands for drops, and tab indicates a tablet form. So the best answer is the abbreviation that expands to semel in die, conveying one dose each day.

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