Letter X

X (drug caution code)

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Abbreviation on a medication that indicates SOS -- that the medication contains a substance such as acetaminophen that could cause problems -- consult your pharmacist.

While not a part of the historical heritage of ancient prescription abbreviations, drug caution codes provide very valuable warnings.

If you see a caution code on a prescription, talk to your pharmacist about it before using the medicine.

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Medical disclaimer

The information on this page is for educational and informational purposes only and does not constitute medical advice in any way.

  • It does not replace the advice of a physician, pharmacist or other healthcare professional.
  • It does not represent a prescription of drugs, diagnostic exams or therapies.
  • In case of symptoms, doubts or concerns about your health, always consult a qualified physician.

In case of emergency call 911 (US) or 112 (EU).