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Pharm Derm
Drugs for Dermatology Disorders 511-01
129
Medical
Graduate
05/15/2009

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Term
Contact dermatitis
Definition
an erythematous, scaly eruption secondary to exposure to a chemical irritant
Term
Atopic dermatitis
Definition
an *allergic* dermatitis characterized as a pruritic, chronic inflammation
Term
What is another name for *eczema* and what is the prevalence of eczema?
Definition
contact dermatitis
affects 5%-10% or population
Term
Goals of dermatitis tx
Definition
restoration of normal epidermal layer, tx of inflammation, and control of itching
Term
usual drugs for dermatitis tx
Definition
corticosteroids
Term
Where are natural corticosteroids produced?
Definition
*adrenal cortex*
Term
3 types of corticosteroids
Definition
glucocorticoids
mineralcorticoids
adrenal androgens
Term
primary human gulcocorticoid
Definition
cortisol
Term
What drugs control carb, protein, and fat metabolism?
Definition
glucocorticoids
Term
What drugs affect basal secretion necessary for organ function?
Definition
glucocorticoids
Term
In what drugs are extra secretion necessary for physical and mental stress?
Definition
glucocorticoids
Term
What drugs are used for suppressing inflammation and immune system?
Definition
glucocorticoid therapy
Term
What drugs involve multiple systemic adverse effects as an extension of physiological effects?
Definition
glucocorticoids
Term
Topical corticosteroids are more accurately known as what?
Definition
glucocorticoids
Term
Glucocorticoids are synthetic analogs of what endogenous hormone?
Definition
cortisol (hydrocortisone)
Term
What mode of corticosteroid tx is preferred to avoid systemic adverse effects?
Definition
topical corticosteroids
Term
What drugs are used topically as anti-inflammatory agents?
Definition
topical corticosteroids
Term
Systemic absorption and toxicity potential of topical corticosteroids increases with what 4 variables?
Definition
1. Surface area covered
2. Vehicle (ointment > cream > lotion)
3. Potency of steroid
4. Duration of application
Term
On what is classification of topical corticosteroids based?
Definition
anti-inflammatory potency
Term
What is the potency of triamcinolone acetonide 0.5%?
Definition
high potency
Term
What is the potency of Betamethasone dipropionate 0.05%? (Diprolene)
Definition
high potency
Term
What is the potency of Triamcinolone acetonide 0.1%?
Definition
medium potency
Term
What is the potency of hydrocortisone 1% (OTC)
Definition
low potency
Term
How does potency of drugs prescribed vary with acute flare-ups versus chronic phase of a disease?
Definition
May start with high potency product for acute flare-up, then switch to lower potency agent
Term
What vehicle of corticosteroid delivery is more occlusive, causing greater absorption?
Definition
ointments are more potent than lotions of the same concentration of drug b/c of greater absorption
Term
Systemic corticosteroids are reserved for what conditions?
Definition
severe inflammatory conditions
Term
How should a systemic corticosteroids be administered for severe contact dermatitis such as poison ivy?
Definition
Give a high dose to start and taper over several days
Term
What side affect involving organs that secrete adrenal-related hormones should be avoided when administering systemic corticosteroids?
Definition
Supression of hypothalamic-pituitary-adrenal axis
Term
What pathology involves:
-increased sebum production
-follicular hyperkeratinization
-proliferation of proprionibacterium acnes
-androgen production
-inflammation
Definition
Acne-pathogenesis
Term
What are 5 factors of affecting choice of drug tx for acne?
Definition
1. Types of lesions
2. Clinical severity
3. Cost effectiveness
4. Psychological impact
5. Benefit v. Risk of drugs
Term
What vehicle is preferred for topical tx of acne, and why?
Definition
Gels and solutions preferred- cause more drying than cream or lotion.
Term
What vehicle should never be used in tx of acne?
Definition
Never use ointment for acne- occlusive
Term
What 5 drug types are used in tx of acne?
Definition
1. Benzoyl peroxide
2. Azelaic Acid
3. Retinoids
4. Antibacterial agents
5. Salicylic acid and sulfur- in many OTC compounds
Term
Is Benzoyl peroxide available OTC or Rx?
Definition
Available in both OTC and prescription strenghts
Term
What is a bactericidal agent against P. acnes that can decrease acne by 90%?
Definition
Benzoyl peroxide
Term
Benzoyl peroxide is metabolized in the skin to what compound?
Definition
benzoic acid, which is lipophilic, allowing it to penetrate better than other topical antibiotics
Term
Benzoyl peroxide is more effective when used how?
Definition
*More effective when used in combination with topical retinoids or antibiotics*
Term
What are 2 possible side effects of benzoyl peroxide?
Definition
possible skin irritation and dryness
Term
How can skin irritation with benzoyl peroxide be avoided?
Definition
begin with low concentration to minimize irritation
Term
What drug can bleach hair, linens, and clothes?
Definition
benzoyl peroxide
Term
For what conditions is benzoyl peroxide indicated?
Definition
mild to moderate acne
Term
What drug is anti-keratinizing, anti-inflammatory, and reduces P. acnes proliferation?
Definition
Azelaic Acid (Azelex)
Term
Is Azelaic Acid (Azelex) available OTC or Rx?
Definition
Rx product
Term
Which drug is more irritating: Benzoyl Peroxide or Azelaic Acid (Azelex)?
Definition
Azelaic Acid (Azelex) is less irritating than benzoyl peroxide
Term
What is a side affect of Azelaic Acid (Azelex)?
Definition
can cause hypopigmentation
Term
With what other drugs is Azelaic Acid (Azelex) prescribed?
Definition
Used in combination with topical retinoids or oral antibiotics
Term
Topical retinoids are derivatives of what?
Definition
Natural and synthetic derivatives of retinol
Term
What drugs normalize or reverse keratinization that leads to plugging?
Definition
topical retinoids
Term
What are 3 topical retinoids?
Definition
1. Tretioin (Retin-A and others)
2. Adapalene (Differin)
3. Tazarotene (Tazorac)
Term
What is the oldest and most common retinoid?
Definition
Tretinoin (Retin-A and others)
Term
What are common side affects of Tretinoin (Retin-A and others)?
Definition
skin irritation and contact dermatitis common
Term
What concurrent effect may also occur with Adapalene (Differin) and Tazarotene (Tazorac)?
Definition
Also have some anti-inflammatory activity
Term
Which drugs are more expensive: Tretinoin (Retin-A and others), Adapalene (Differin), or Tazarotene (Tazorac)?
Definition
The newer retinoids Adapalene (Differin) and Tazarotene (Tazorac) are more expensive
Term
How is acne expected to progress when treated with topical retinoids?
Definition
Dryness and minor irritation expected
Acne may temporarily worsen
Term
What is the minimum time frame for use of topical retinoids?
Definition
Need to try for a minimum of 6 weeks
Term
How should topical retinoids be applied?
Definition
Apply "pea-sized" amt to *dry* skin
Term
How frequently should topical retinoids be applied?
Definition
start every other evening or every 3rd evening for a few weeks to decrease adverse drug rxns
Term
What are 3 topical antibacterial agents?
Definition
1. Erythromycin
2. Clindamycin (Cleocin T)
3. Metronidazole (Metrogel)- less commonlyl used
Term
What drug works via bacteriostatic action, decreasing bacterial colonization of P. acnes and reducing inflammation?
Definition
Topical antibacterial agents
Term
To generate maximum effect from topical antibacterial agents, how should they be prescribed?
Definition
More effective when combined with other topical agents
Term
How can development of bacterial resistance occuring with use of topical antibacterial agents be slowed?
Definition
combine antibacterial agents with other topical agents
Term
By what mechanism does salycilic acid 2% work?
Definition
keratolytic agent
Term
What are 3 drugs containing salicylic acid 2%?
Definition
1. Clearasil
2. Neutrogena
3. PROPApH
Term
What are 2 sulfer containing compounds used in acne tx?
Definition
Sulpho-Lac
Acne Lotion 10
Term
Are drugs containing salycylic acid 2% or sulfur available OTC or Rx?
Definition
Topical OTC agents
Term
What are 4 categories of oral therapy for acne?
Definition
1. Antibiotics
2. Contraceptives
3. Sprionolactone (Aldactone)
4. Isotretinoin (Accutane)
Term
Which is more effective in acne tx: oral or topical antibiotics?
Definition
*Oral antibiotics are more effective than topical tx*
Term
What is the most common tx for acne vulgaris?
Definition
Oral antibiotics
Term
When are oral antibiotics indicated for tx of acne?
Definition
moderate to severe inflammatory acne
Term
What oral antibiotics are most commonly used for tx of acne?
Definition
1. The tetracyclines (tetracycline, minocycline, and doxycycline)
2. Also can use erythromycin and clindamycin
Term
What are 2 side affects of tetracyclines (tetracycline, minocycline, and doxycycline) for acne tx?
Definition
1. Photosensitivity rxns- avoid prolonged sunlight/tanning
2. Pregnancy category D- known teratogen
Term
What is one side effect of erythromycin and clindamycin in acne tx?
Definition
GI problems more frequent
Term
How long do oral antibiotics take to tx acne?
Definition
*take 3-6 mos*
Term
What drugs are oral antibiotics used in tx of acne?
Definition
Use with topical retinoids +/- benzoyl peroxide
Term
Resistance may occur in what percentage of acne pts receiving oral antibiotic tx?
Definition
resistance may occur in up to 25% of pts
Term
What are 2 categories of anti-androgenic tx of acne?
Definition
1. oral contraceptives
2. spironolactone (Aldactone)
Term
When are oral contraceptives indicated for tx of acne?
Definition
For women with persistent inflammatory acne, occurring around menses
Term
What is the action of oral contraceptives in tx of acne?
Definition
Suppresses production of free testosterone
Term
Why are newer progestins in oral contraceptives preferred for tx of acne?
Definition
Newer progestins in OC's have less androgenic activity and are preferred
Term
What is the action of spironolactone (Aldactone)
Definition
an aldosterone antagonist
Term
When is spironolactone (Aldactone) indicated for use in tx of acne?
Definition
only for resistant cases
Term
What is a side effect of spironolactone (Aldactone)
Definition
Category D pregnancy risk
Term
What is a drug for tx of acne that is derived from vitamin A
Definition
Oral Isotretinoin (Accutane)
Term
*What is the most effective tx option for acne?*
Definition
Oral isotretinoin (Accutane)
Term
*What drug for tx of acne has the most potential for toxicity?*
Definition
Oral Isotretinoin (Accutane)
Term
What drug for tx of acne acts by suppressing abnormal keratinization, increased sebum production, proliferation of P. acnes, and inflammation?
Definition
Oral Isotretinoin (Accutane)
Term
What are 4 adverse affects of Oral Isotretinoin (Accutane)?
Definition
1. Dry skin and mucous membranes most common
2. Elevated lipids in 25%
3. Back pain and arthralgias reported in 20-30% of children
4. Black Box Warning: Possible aggressive and violent behavior
Term
When is Oral Isotretinoin (Accutane) indicated for tx of acne?
Definition
Only use for severe acne unresponsive to other therapies
Term
What is the program in which pt, physician, and pharmacy must all meet the requirements and register in program before the drug can be prescribed and dispensed?
Definition
iPLEDGE program, for Oral Isotretinoin (Accutane) tx of acne
Term
What acne medication is a known teratogen- Pregnancy category X?
Definition
Oral Isotretinoin (Accutane)
Term
What FDA category is applied when controlled trials fail to demonstrate risk to human fetus?
Definition
Category A
Term
What FDA category is applied when animal studies do not indicate risk, or animal studies indicate risk but controlled trials in pregnant women do not?
Definition
Category B
Term
What FDA category is used when no studies are available or animal studies indicate risk but no controlled trials on women have been published?
Definition
Category C
Term
What is the most common FDA category for drug use in pregnancy?
Definition
Category C
Term
What FDA category is applied when positive evidence of fetal risk has been demonstrated but situations may exist where benefit outweighs the risk?
Definition
Category D
Term
What FDA category is applied when definite fetal risk exists and risk clearly outweighs benefit?
Definition
Category X
Term
What is the first line of tx for acne?
Definition
topical therapy (min of 6 weeks)
Term
What is the second line of tx for acne?
Definition
oral antibiotics plus topical therapy
Term
What is the third line of tx for acne?
Definition
referral to dermatologist +/- oral isotretinoin
Term
What dz involve facial eruption of unknown etiology?
Definition
Rosacea
Term
What is the first line of therapy for rosacea?
Definition
topical antibiotics
Term
What are the most common topical antibiotics used to tx rosacea
Definition
metronidazole (Metrogel) and azelaic acid (Azelex) most common
Term
What is the second line of therapy for tx of rosacea?
Definition
topical agents and oral antibiotics used for acne
Term
What is the last resort for tx of rosacea?
Definition
oral isotretinoin
Term
What is a chronic, relapsing dz of the skin with raised erythematous plaques with distinct borders, silvery scales, glossy erythema, and punctate bleeding if scale removed, involving 2% of the population?
Definition
psoriasis
Term
When is topical therapy indicated for psoriasis?
Definition
Lmt to pts with mild to moderate disease and lesions that cover *less than 20%* of body surface area
Term
What is the drug of choice for psoriasis?
Definition
topical corticosteroids: *ointments* most effective
Term
What is a vitamin D3 analog used with steroid that inhibits keratinocyte proliferation and is used in tx of psoriasis?
Definition
Calcipotriene (Dovonex)
Term
What is a retinoid that is similar in effect to high potency steroids that is used in tx of psoriasis?
Definition
Tazarotene (Tazorac)
Term
What are 3 common side effects of Tazarotene (Tazorac)?
Definition
Erythema, burning, and pruritis common
Term
When is phototherapy indicated in tx of psoriasis?
Definition
when unresponsive to topical therapy
Term
What is the 1st line of phototherapy used in tx of psoriasis?
Definition
UV-B radiation
Term
What is the second line of phototherapy used in tx of psoriasis?
Definition
Photochemotherapy with Psoralen and UV-A (PUVA)
Term
Oral 8 methoxypsoralen followed by exposure to UV-A light after 2 hrs is used for what dz?
Definition
Psoriasis
Term
How does psoralen work?
Definition
Psoralen combines with DNA to increase sensitivity to UVA and improve hyperproliferative phase of psoriasis
Term
when is systemic therapy for psoriasis indicated?
Definition
for moderate to severe disease
Term
What are 3 forms of systemic therapy for psoriasis?
Definition
methotrexate, cyclosporine, and acitretin (Soriatane)
Term
What is a folic acid antagonist that inhibits DNA synthesis and is used in tx of psoriasis (chemotherapy agent in higher doses)?
Definition
methotrexate
Term
Is methotrexate prescribed weekly or daily in tx of psoriasis?
Definition
*weekly*
Term
What are 2 common ADE's and 3 severe ADE's of methotrexate?
Definition
common ADE's: nausea, phototoxicity
severe ADE's: hepatotoxicity, bone marrow suppression
Pregnancy category X: teratogenic
Term
What is the action of cyclosporine in tx of psoriasis?
Definition
immunosuppressant (also used after organ transplants)- low doses for psoriasis
Term
What are 3 ADR's in cyclosporine used in tx of psoriasis?
Definition
nephrotoxicity, htn, drug interactions (both substrate and inhibitor of CYP 3A4 enzymes)
Term
What is an oral retinoid, synergistic with phototherapy that is used in tx of psoriasis?
Definition
Acitretin (Soriatane)
Term
What are 4 ADE's of Acitretin (Soriatane)?
Definition
excessive drying, hair loss, vision loss
pregnancy category X: teratogenic
Term
What are 2 types of recombinant technologies producing unique biologic agents specifically targeting the immune system, used in tx of psoriasis?
Definition
T-Cell inhibitors
TNF (Tumor necrosis factor) inhibitors
Term
Alefecept (Amevie) given IV and Efalizumab (Raptiva) given SC are used in tx of what dz?
Definition
T-Cell inhibitors- biological therapy for psoriasis
Term
What are 4 ADE's of T-Cell inhibitors used in tx of psoriasis?
Definition
headache
chills
fever
serious infections
Term
Etanercept (Enbrel) given SC, Infliximab (Remicade) given IV, and Adalimumab (Humira) given SC are used to treat what dz?
Definition
TNF inhibitors used in biological therapy for psoriasis
Term
What are 3 ADE's of TNE inhibitors used in biologic therapy of psoriasis?
Definition
Bacterial sepsis
reactivation of TB
malignancy
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