What does HS mean in a doctor's Prescription?

Appeared in: Uttarakhand CHO - 2021

Explanation

The abbreviation 'HS' originates from the Latin term Hora Somni, which means 'hour of sleep'.
This instruction directs the patient to take the medication at bedtime.
It is typically used for medications that cause drowsiness (like sedatives) or are most effective when taken overnight.

Option A: This is incorrect. The abbreviation for taking medicine three times a day is 'TID' or 'TDS' (Ter in Die).
Option B: This is incorrect. The abbreviation for taking medicine when necessary is 'PRN' (Pro Re Nata) or 'SOS' (Si Opus Sit).
Option C: This is incorrect. The abbreviation for taking medicine twice a day is 'BID' or 'BD' (Bis in Die).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Medical Prescription Abbreviations as background academic context rather than a clinical decision trigger.
Accurate interpretation of prescription abbreviations is a fundamental nursing responsibility to ensure the 'Right Time' and 'Right Frequency' of medication administration, which are critical components of the rights of medication administration.
Misinterpreting an abbreviation can lead to serious medication errors, such as underdosing, overdosing, or administering a drug at the wrong time, potentially causing harm to the patient.
What if? If a nurse misreads 'HS' (at bedtime) as 'qhs' (every night at bedtime), the meaning is similar. However, if it were mistaken for 'qh' (every hour), a sedative meant to be taken once could be administered every hour, leading to a dangerous overdose, respiratory depression, and potentially death.

How to Approach the Question

Identify the core of the question: The question asks for the meaning of the specific medical abbreviation 'HS'.
This is a factual recall question. Access your knowledge base of common medical and prescription terminology.
Recall or look up the Latin origin of 'HS', which is Hora Somni.
Translate Hora Somni to its English meaning: 'hour of sleep' or 'at bedtime'.
Evaluate the given options and select the one that matches this definition.
Eliminate the other options by recalling their corresponding abbreviations (TID for three times a day, PRN for as needed, BID for twice a day).

Concept Tested & Keywords

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E6 Pharmacology Katzung 16e pp. 1791-1793, 1790-1792

Practise the full Uttarakhand CHO - 2021

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