Question:

Assertion A: Local anesthetic 2.5% lignocaine and 2.5% Prilocaine are used in combination for dental application. Reason R: In combination they make eutectic, which easily cross keratinized layer of intact skin.

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EMLA = Eutectic Mixture of Local Anesthetics. It turns solids into a high-penetration liquid "oil."
Updated On: May 28, 2026
  • Both A and R are correct and R is the correct explanation of A
  • Both A and R are correct but R is NOT the correct explanation of A
  • A is correct but R is not correct
  • A is not correct but R is correct
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The Correct Option is A

Solution and Explanation

Step 1: Concept
This refers to the EMLA (Eutectic Mixture of Local Anesthetics) cream technology.

Step 2: Meaning

A eutectic mixture is a mixture of substances that melts at a lower temperature than any of its individual constituents.

Step 3: Analysis

Lignocaine and Prilocaine, when mixed in equal parts (2.5% each), form a liquid oil at room temperature. This liquid state allows for higher drug concentration and significantly better penetration through the skin's keratinized layers compared to individual components.

Step 4: Conclusion

Both statements are true, and the formation of the eutectic mixture is the direct reason for the enhanced penetration.

Final Answer: (A)
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