Lecture 5 (Derm)- Exam 3 Flashcards
Steroids:
* Endogenous steroids produced where?
* Steroids released when?
* What effects?
- Endogenous steroids produced in the adrenal gland (MC cortisol)
- Released in response to stress and inflammation
- Anti-inflammatory and immunosuppressive effects
What is the MOA of steroids? (cytokines and mediators)
Inhibit the production of inflammatory cytokines
* Bind to glucocorticoid receptors inside cells
* Bind to sites on DNA
* Down regulate cytokine production
Inhibit the production of inflammatory mediators
* Inhibit phospholipase A2
* Prevents the production of arachidonic acid
* Decreasing prostaglandins, leukotrienes, thromboxane
Immunosuppression
Steroids effects:
* What do they suppress?
Suppress inflammatory response to all noxious stimuli
* Pathogens
* Chemical / physical
* Immune mediated / hypersensitivity
How does steroids reduce inflammation? (4)
Reduce inflammation by DECREASING:
* Cytokine production – including various interleukins, tumor necrosis factor alpha
* Recruitment of WBCs and monocytes to sites of inflammation (neutrophil demargination)
* Lymphocyte, monocytes, basophil, eosinophil, mast cell production / function-> T-lymphocyte activity
* Production of prostaglandins, bradykinins, leukotrienes (inhibition of phospholipase A2)
T/F: Steroids corrects the underlaying cause of disease
False
What are the short term steroids effects? (6)
What are the long term steroids effects? (8)
What are the different vehicles of topical corticosteroids?
- Ointments
- Creams
- Lotions
- Gels
- Foams
TCS:
* What does it decrease?
* How is it anti-inflammatory?
* Vasoconstrictor or VD?
* Decreases what molecules?
* Anti_
* Inhibits what?
* Immunosuppressive or immunopotent?
- Decrease burning or itching
- Anti-inflammatory->Decrease production of pro-inflammatory genes
- Vasoconstrictive of perperial vessels
- Decreases prostaglandin and leukotriene synthesis
- Antimitotic
- Inhibits cell proliferation and collagen synthesis
- Immunosuppressive
What is the MOA of TCS?
Topical bases
* Penetrations increases with what?
* What also increases penetrations?
- Penetration increased with moisture->Apply after shower or bath
- Plastic dressings increase penetration
Ointments:
* What are the properties? (3)
* What are the uses/comments (3)
Properties:
* Potency high
* High lubrication
* Occlusive (help keep moisture in)
Uses/comments:
* Very dry to thick, hyperkeratotic lesions
* Avoid in areas with hair
* Greasy = poor satisfaction/ compliance
Cream:
* What are the properties? (4)
* What are the uses/comments (2)
Properties:
* Lower potency
* (drug: drug)
* Less occlusive
* Drying effects
Uses/Comments:
* Vanish in skin – more appealing
* More often contain preservatives (Sensitivity to skin)
Lotions/gel:
* What are the properties? (1)
* What are the uses/comments (3)
Properties:
* Least occlusive or greasy
Uses/comments:
* Lotions-contain alcohol; drying for oozing lesions
* Good for areas with hair
Shampoos, foams, mouses
* What are the properties? (1)
* What are the uses/comments (2)
properties
* least effective vehicle
Uses/comments:
* Easy to apply
* good for areas with hair
How are the steroid potency classes determined? How many classes are there?
Determined by vasoconstriction / blanching test
* Seven classes
Steroid potency classes:
* Group one: Potency level, what type of disease, how long, areas of skin?
Group 1 = highest potency (ultra, super)
* Severe disease
* Short duration (3 weeks)-> then stop, small areas
* Not face, groin, axilla
* Not under occlusion
Steroid potency classes:
* Group seven: Potency level, safety level, how long, what areas of the body?
Group 7 = lowest potency
* Safest
* Long-term (3 months), large areas
* Face, thin skin
* Children
What happens when you have chronic administrations of steroids? (4)
- Tolerance, tachyphylaxis
- Taper off to prevent rebound symptoms then go to next bullet point
- Off x 1 week
- Resume at maintenance dosing (BIW) after tapering
Topical Steroid dosing?
- Once or twice daily
- Fingertip unit = 0.5 grams
BET PROB FLU
list drug and percent
List drugs and percent
TCS ADVERSE EFFECTS
* What are the local effect? (9)
TCS ADVERSE EFFECTS
* What are the systemic symptoms? (6)
TOPICAL CALCINEURIN INHIBITORS
* What is the MOA (3)?
- Bind calcineurin and inhibit the production of nuclear factor of activated T-cells (NFAT)
- NFAT necessary for T-cell production of cytokines
- No production of cytokines (IL2, etc)
TOPICAL CALCINEURIN INHIBITORS
* Indictions (2)?
- Moderate to severe atopic dermatitis
- Patients ≥ 2 years
TOPICAL CALCINEURIN INHIBITORS
* Improved benefit when?
* Safe for what?
* What are the BBW (2)?
* What is the adverse reactions?
* What education do you give to your patient?
Improved benefit when added to TCS
Safe for sensitive areas
BBW:
* Increased risk of non-melanomatous skin cancers and lymphoma
* Weak evidence
Adverse reactions: Local burning sensation
Education - sunscreen
- What are the two topical calcineurin inhibitors?
- What is important about them?
- What are the preparations?
Antihistamines:
* Histamine released from what?
* What happens when histamine binds to H1 receptors?
* What happens when histamine binds to H2 receptors?
How does antihistamine work?
What are the indications for first gen antihistamine? (7)
- Allergies
- Motion sickness
- Vertigo
- Sedation
- Insomnia
- Cold symptoms
- EPS treatment
maces vi
First gen antihistamine:
* Does it cross the BBB?
* What receptors do they affect?
Yes
* Antiemetic
* Histamine
* Acetylcholine receptor blockage
What are the SE of first gen antihistamines?
- Cholinergic - anticholinergic (Mad hatter)
- Alpha adrenergic – hypotension
- Serotonergic – increased appetite
Mad hatter: fever, dry mucous mem, flushing, blurred vision (mydriasis), Hallcuninations, sedation and tachycardia
What are the first gen antihistamines examples (8)?
- Brompheniramine
- Chlorpheniramine
- Cyproheptadine (Periactin)-> not really allergic but serotoninic
- Diphenhydramine (Benadryl)
- Hydroxyzine hcl / pamoate (Atarax)-> good for anti-itch
- Promethazine (Phenergan)->serotoninic
- Meclizine (Antivert)
- Dimenhydrinate (Dramamine)-> motion sickness
- Diphen – insomnia
- Prometh, mecli, dimen = n/v associated with motion sickness
What is the class/indication of 2nd gen antihistamine?
- Allergies only
- H1 selective
2nd gen antihistamine:
* Does it cross BBB?
* What are the SE?
- No
- Less SE
What are the 2nd gen histamine drugs (5)?
- Cetirizine (Zyrtec)
- Levocetirizine (Xyzal)
- Loratadine (Claritin)
- Desloratadine (Clarinex)
- Fexofenadine (Allegra)
-irizine or -adine
What are humectant, emollients and occlusive?
Humectant:
* What happens to skin?
* What skin type to use it on?
* what are examples?
emollient:
* What happens to skin?
* What skin type to use it on?
* what are examples?
Occlusive:
* What happens to skin?
* What skin type to use it on?
* what are examples?
What are the different eczematous rash?
ATOPIC DERMATITIS (ECZEMA)
* What type of condition?
* What type of rxn?
* What is the pathophysiology?
ECZEMA PATTERNS
* What type of rash?
* What areas of body?
* Worsens when?
- Dry, itchy rash see
- Flexor surfaces (elbows, wrists, knees)
- Face, hands, feet
- Worsens when exposed to allergens
Atopic dermatitis:
* What are the treatment goals?
- Provide symptom relief
- Control atopic dermatitis
- Identify and reduce triggers
- Prevent exacerbations
- Minimize treatment adverse effects
- Treat secondary skin infections->MC Staphylococcus
Nonpharmacologic therapies for atopic dermatitis:
* What should the pt throughout the day?
* What should help with hydration?
* Use what? What are the characteritics? (3)
* Apply what?
* Keep what short?
* What type of fabrics?
* Consider what?
* body temp?
- What is the first line pharmacologic therapy for atopic derminitis?
- What are the directions?
TCS:
* Reactive therapy for mild disease
* Proactive therapy for moderate to severe disease-> Long-term anti-inflammatory therapy – usually 2 days per week
* Potency should match disease severity and location
* Taper to avoid withdrawal rebound
What is second line, systemic and toher agents for atopic derm?
Calcineurin inhibitors second-line
* Steroid failure or steroid sparing
Other agents:
* Coal tar
* PDE – 4 inhibitors
* Phototherapy
Systemic therapies:
* Rarely indicated
* Corticosteroids generally not recommended-> Very short term (< 1 week) for severe flare / disease
* Antibiotics for superinfections
Contact dermatitis:
* What type of reaction?
* What type of rash? What are the two types of CD?
What are causes of irritant contact and allergic contact dermtitis?
Contact dermatitis - treatment
* What is first line?
* What is second line?
CONTACT DERMATITIS - TREATMENT
* What do you use for acute and weeping?
ECZEMATOUS DERMATITIS
What are the nonpharmacologic txt for nummular dermatitis?
- Reduce skin dryness
- Moisturize 1-2 times daily
- Reduce irritants
- Non soap cleansers
- House humidification