Question
Which of the following is correct about the EMLA patch shown in the image below?
| A. |
The most common adverse effect of EMLA patch is methemoglobinemia
|
| B. |
Contains bupiThe patch contains bupivacaine and lidocaine
|
| C. |
EMLA patch is a eutectic mixture of lidocaine and prilocaine
|
| D. |
The concentration of lidocaine used in the patch is 0.5%, equaling 50 mg/gvacaine & lignocaine
|
Show Answer
|
Correct Answer » C
Explanation
|
|
EMLA stands for Eutectic Mixture of Local Anesthetics, which consists of:
Lidocaine (2.5%)
Prilocaine (2.5%)
When combined in eutectic proportions, they form an oil at room temperature, enhancing skin penetration and allowing effective topical anesthesia.
The EMLA patch is indeed a eutectic mixture of lidocaine and prilocaine, which makes it ideal for transdermal anesthesia.
Option A: Methemoglobinemia is a rare but known side effect, especially due to prilocaine, and more likely in neonates or after excessive use, but it is not the most common effect in general usage.
Option B: EMLA does not contain bupivacaine. It contains lidocaine and prilocaine, both amide-type local anesthetics.
Option D: Lidocaine concentration in EMLA is 2.5%, i.e., 25 mg/g—not 0.5% or 50 mg/g.
Like this:
Like Loading...
