Practice Question Answers: Sunscreen Agents
This fact sheet served to review sunscreens that are classified as physical (inorganic) or chemical (organic), with some products containing both types of agents.
1. Which of the following sunscreen agents is most likely to cause a photoallergic reaction on the skin?
a. homosalate
b. oxybenzone
,c. PABA
d. padimate O
e. zinc oxide
2. Which of the following sunscreen agents is least likely to cause an allergic reaction when applied?
a. ecamsule
b. octisalate
c. padimate A
d. titanium dioxide
e. trolamine salicylate
3. Of the following, which is/are considered to be an inorganic sunscreen agent?
a. PABA
b. titanium dioxide
c. zinc oxide
d. A, B, and C
e. B and C
4. Sunscreens containing PABA or one of its derivatives may cross-react with which of the following?
a. bananas
b. doxycycline
c. griseofulvin
d. naproxen
e. sulfonamides
5. Which of the following is/are used in sunscreens for UVA protection?
a. avobenzone
b. ecamsule
c. octisalate
d. A, B, and C
e. A and B