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Exam NAPLEX topic 1 question 43 discussion

Actual exam question from Test Prep's NAPLEX
Question #: 43
Topic #: 1
[All NAPLEX Questions]

If you mix 30 gm 5% lidocaine cream and 90gm of 0.5% hydrocortisone cream, what percent of lidocaine and hydrocortisone do you have as the end product?

  • A. Lidocaine/Hydrocortisone 2%/1.25%
  • B. Lidocaine/Hydrocortisone 0.375%/0.15%
  • C. Lidocaine/Hydrocortisone 1.25 %/ 0.15%
  • D. Lidocaine/Hydrocortisone 2% /0.25%
  • E. Lidocaine/Hydrocortisone 1.25% /0.375%
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Suggested Answer: E 🗳️
Lidocaine: 30g × 0.05 = 1.5g. Hydrocortisone: 90g × 0.005 = 0.45g. 90g + 30g = 120g. 1.5g/120g = 0.0125 × 100 = 1.25% Lidocaine. 0.45g/120g = 0.00375 × 100
= 0.375% Hydrocortisone.
by Paco1 at May 18, 2022, 5:34 a.m.

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Paco1
4 months, 3 weeks ago
What does A represent in the calculations steps?
upvoted 1 times
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