According to the Institute for Safe Medication Practices ISMP the abbreviation MS or MSO4 for morphine may be misinterpreted as:

Rationale

Magnesium sulfate

According to the Institute for Safe Medication Practices (ISMP), the abbreviations **MS** and **MSO₄** (intended for morphine sulfate) can be misinterpreted as **magnesium sulfate**. This confusion is well documented and dangerous because the two medications have very different uses and dosing, which can lead to serious patient harm if administered incorrectly.

A (Hydromorphone) YOUR ANSWER

This is incorrect. While hydromorphone is often confused with morphine due to similar names, it is not specifically associated with the abbreviations MS or MSO₄.

B (Hydrocortisone) YOUR ANSWER

This is incorrect. Hydrocortisone is not related to the abbreviation MS or MSO₄ and is not a known misinterpretation in this context.

C (Hydralazine) YOUR ANSWER

This is incorrect. Hydralazine does not resemble MS or MSO₄ and is not associated with this abbreviation error.

D (Magnesium sulfate) CORRECT

This is correct. ISMP specifically warns that MS and MSO₄ may be confused with magnesium sulfate, making it a significant medication safety risk.

Conclusion

Ambiguous abbreviations like MS and MSO₄ can lead to serious medication errors. ISMP recommends avoiding these abbreviations altogether to prevent confusion between morphine sulfate and magnesium sulfate, ensuring safer prescribing and administration practices.

According to the Institute for Safe Medication Practices ISMP the abbreviation MS or MSO4 for morphine may be misinterpreted as:

Magnesium sulfate

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