Insect Bits + Stings + Pediculosis Flashcards
N,N-Diethyl-M-Toluamide (DEET) works by…?
protecting against insect bites w/o killing the insect
At what age is DEET not encouraged?
<2 months
What % DEET does not provide additional protection, but may have longer repellent effect?
> 50%
Permethrin 0.5% is designed to use only on ______
clothing + camping equipment
Which insect repellent is promoted as being less odorous and irritating than DEET?
Picaridin
What is the MOA of local anesthetics?
Reversible blockade of conduction of nerve impulses at the site of applications (produces loss of sensation
Which should be applied first, sunscreen or insect repellent?
Sunscreen
What’s wrong with products that have both insect repellent properties + sunscreen?
You either apply too much insect repellant or too little sunscreen
How do phenols work?
Exerting topical anesthetic action by depressing cutaneous sensory receptors
What is the recommended topical antihistamine?
Diphenhydramine .5-2%
What is the MOA of topical diphenhydramine?
Depresses cutaneous receptors
What is something to look out for topical diphenhydramine?
Dont use on large areas of body
What is the MOA of counterirritants (camphor + menthol)?
Depresses cutaneous receptors
What kind of properties does hydrocortisone 1% have?
Anti-inflammatory + antipruritic effect
What are some adverse effects of hydrocortisone 1%?
Contact dermatitis, sensitization, burning sensation, skin irritation
Which skin protectants help absorb fluids from weeping lesions?
Zinc oxide + calamine lotion
Which skin protectant is a mild astringent w/ antiseptic properties?
Zinc oxide
What does ammonia + baking soda do to venom?
Neutralize it
What is the age exclusions for both pyrethrins + permethrins?
<2 yrs for pyrethrins
<2months for permethrins
For the nonpharmacologic treatments of lice, you should wash your hairbrush, clothing, etc in ____ water and at least ___ degrees Fahrenheit
hot
130
What is the MOA of synergized pyrethrins?
Blocks nerve impulse transmissions causing death within the parasite
What is pyrethrin usually synergized w/?
piperonyl butoxide
What is the MOA of piperonyl butoxide?
Limit the ability of lice to break down the pyrethrin
Pyrethrin vs Permethrin, which has to be repeated?
Pyrethrin
Which treatment only applies to head lice only?
Permethrin
What is the MOA of permethrin?
Disrupts sodium channel and delaying repolarization causing death of parasite
