sunscreen/sunburns (copy)

which UV penetrates deeper into the skin and causes more damage?

a. UVA

b. UVB

a.

which UV causes photosensitivity reaction if taking/applying photosensitizing medications and penetrates glass?

a. UVA

b. UVB

a.

which UV increases with altitude (important for skiiers/snowboarders)?

a. UVA

b. UVB

b.

what is the ABCD(E) self-examination for melanoma?

A = asymmetric shape

B = border irregular/poorly defined border

C = color variation within same mole or color change

D = diameter > 6 mm

E = evolving/changing mole

idk if important

distinguish between the 2 categories of drug photosensitivity

photoallergy	photosensitivity
immunologic response	NOT immunologic
NOT dose related	dose related
appears after taken medication AT LEAST ONCE before	seen on FIRST exposure to medication
UVA causes antigenic response

list photosensitive meds

there’s a lot, but i would not be surprised if this was a question

• sulfonamides

• trimethoprim

• furosemide

• triamterene

• tetracyclines

• hydrochlorothiazide

• azithromycin

• quinolones

• NSAIDs

• ACEis

• SSRI

• amiodarone

• ketoconazole, itraconazole

• metronidazole

• benzoyl peroxide

• olanzapine

mnemonic for photosensitizing meds (there’s more but this is what it gave me)

from chat

SAT For A Bright Sunny Day

• S = sulfa drugs

• A = anti-inflammatories, amiodarone

  • NSAIDs

• T = tetracyclines

  • doxycycline, minocycline

• F = fluoroquinolones

  • -floxacin

• A = antifungals

  • ketoconazole, itraconazole

• B = benzoyl peroxide

• S = SSRIs, St. john’s wort

• D = diuretics

  • HCTZ, furosemide, triamterene

list exclusions for sun exposure

allergy to all sun protectant ingredients

< 6 months old

what kind of protective clothes should be worn in the sun?

hat with 4 inch brim

long pants

long-sleeved shirt or clothes with UPF label

SPF is a measure of protection against _____

a. UVA

b. UVB

b.

why do we typically use a max SPF of 50?

lack of evidence that any more is better

if sunscreen is labeled as “water-resistant” what must be stated on the label?

effective for either 40 or 80 minutes when swimming/sweating

which sunscreen is a film on the skin that ABSORBS UVR?

a. chemical

b. physical

a.

which sunscreen REFLECTS/SCATTERS UVR?

a. chemical

b. physical

b.

idk if we need to know — probably easier to just know the physical ones

list the chemical sunscreens and their UV coverage

• aminobenzoic acid and derivatives (previously PABA): UVB

• anthranilates: UVA 2

• benzophenones: UVB, UVA 2

  • dioxybenzone

  • oxybenzone

  • sulixobenzone

• cinnamates

  • cinoxate & octinoxate: UVB

  • octocrylene: UVB, UVA 2

• dibenzoylmethane derivatives (avobenzone): UVA 1

• salicylates: UVB

  • octisalate

  • homosalasate

  • trolamine salicylate

• ensulizole: UVB, water resistant

• ecamsule: UVB, UVA 2

what chemical sunscreen has the best UVA protection?

dibenzoylmethane derivatives: avobenzone

list the physical sunscreens and the UV they cover

zinc oxide: UVB, UVA 2, UVA 1

titanium dioxide: UVB, UVA 2, UVA 1

how much sunscreen do we need to apply?

how long before sun exposure should we apply?

how often should we reapply?

apply: 1 oz

15-30 minutes before sun exposure

reapply every 2 hours

reapply after swimming, towel drying, or increased sweating

what do you apply first: sunscreen or insect repellant?

sunscreen

list exclusions for self-treatment of sunburns

• fever

• large areas of blistering

• extreme pain

• HA or confusion

• visual changes or dizziness

• severe swelling

• signs of infection

what systemic analgesics can we use for sunburns?

• NSAIDs

  • ibuprofen

  • naproxen

• APAP

what kind of topical anesthetics can we use for sunburn?

• benzocaine

• lidocaine

• pramoxine

should you take an ice bath if you have sunburn?

why or why not?

NOOOOO

can lead to vasoconstriction and further tissue damage

when do we need to use caution with topical anesthetics?

large wounds or broken skin —> systemic absorption —> seizures, cardiac arrhythmias, methemoglobinemia

what skin protectant is used for sunburns?

aloe vera