Topical Medications
■ Anthralin (Dritho-Scalp, Psoriatec)
■ Calcipotriene (Dovonex)
■ Coal tar
■ Glucocorticoids
■ Keratolytics (topical salicylic acid; sulfur)
■ Tazarotene (Tazorac)
Systemic Medications
■ Acitretin (Soriatane)
■ Cyclosporine
■ Methotrexate
Systemic Biological Medications
■ Alefacept (Amevive)
■ Ustekinumab (Stelara)
Phototherapy
■ Coal tar and ultraviolet B irradiation
■ Photochemotherapy (PUVA [psoralen and ultraviolet A] therapy)
A. Description
1. Psoriasis is a chronic inflammatory disorder that has varying degrees of severity.
2. Treatment is based on the severity of symptoms and aims to suppress the proliferation of keratinocytes or suppress the activity of inflammatory cells.
B. Topical medications
1. Glucocorticoids
a. Used for mild psoriasis
b. Should not be applied to the face, groin, axilla, or genitalia because the medication is readily absorbable, making the skin vulnerable to glucocorticoid-induced atrophy
2. Anthralin (Dritho-Scalp, Psoriatec)
a. Can cause local irritation and skin redness
b. Is applied to lesions at bedtime and allowed to remain on the skin overnight
c. Client should be informed that the medication can stain clothing, skin, and hair.
3. Tazarotene (Tazorac)
a. Is a vitamin A derivative
b. Local reactions include itching, burning, stinging, dry skin, and redness; other, less common effects include rash, desquamation, contact dermatitis, inflammation, fissuring, and bleeding.
c. Sensitization to sunlight can occur and the client should be instructed to use sunscreen and wear protective clothing.
d. Medication is usually applied once daily in the evening to dry skin.
4. Calcipotriene (Dovonex)
a. Is an analogue of vitamin D
b. May take up to 1 to 3 weeks to produce a desired effect
c. Can cause local irritation; high-dose applications may cause hypercalcemia
5. Coal tar
a. Suppresses DNA synthesis, miotic activity, and cell proliferation
b. Has an unpleasant odor and may cause irritation, burning, and stinging; can also stain the skin and hair
6. Keratolytics
a. Soften scales and loosen the horny layer of the skin, resulting in minimal peeling to extensive desquamation
b. Salicylic acid: Can be absorbed systemically and can cause salicylism, which is characterized by dizziness and tinnitus, hyperpnea, and psychological disturbances; salicylic acid is not applied to large surface areas or open wounds because of the risk of systemic effects.
c. Sulfur: Promotes peeling and drying and is used to treat acne, dandruff, seborrheic dermatitis, and psoriasis
C. Systemic medications
1. Methotrexate
a. Reduces proliferation of epidermal cells
b. Can be toxic; causes gastrointestinal effects such as diarrhea and ulcerative stomatitis and bone marrow depression leading to blood dyscrasias
c. Can be hepatotoxic; hepatic function should be monitored during therapy
2. Acitretin (Soriatane)
a. Inhibits keratinization, proliferation, and differentiation of cells; has antiinflammatory and immunomodulator actions; used for severe psoriasis and reserved for use in those who have not responded to safer medications.
b. Is embryotoxic and teratogenic: Medication is contraindicated during pregnancy; pregnancy must be ruled out and two reliable forms of contraception need to be implemented before the medication is started (contraception must be implemented at least 1 month before treatment starts and be continued for at least 3 years after treatment is discontinued).
c. If pregnancy occurs during treatment with the medication, the medication is discontinued immediately and possible termination of the pregnancy is discussed.
d. Dermatological effects include hair loss, skin peeling, dry skin, rash, pruritus, and nail disorders; other effects include rhinitis from mucous membrane irritation, inflammation of the lips, dry mouth, dry eyes, nosebleed, gingivitis, stomatitis, bone and joint pain, and spinal disorders.
e. Can be hepatotoxic; can elevate triglyceride levels and reduce levels of high-density lipoprotein cholesterol
f. Medication should be taken with meals to facilitate absorption; alcohol must be avoided.
g. This derivative of vitamin A can cause vitamin A toxicity if taken at the same time as vitamin A supplements.
h. Should not be taken concurrently with tetracycline because it can cause increased intracranial pressure
3. Cyclosporine
a. An immunosuppressant that inhibits proliferation of B and T cells
b. Can be toxic and cause kidney damage
c. Used for severe psoriasis and reserved for use in those who have not responded to safer medications
D. Systemic biological medications
1. Alefacept (Amevive)
a. The medication reduces the number and activity of memory CD4+ T lymphocytes; therefore the medication is contraindicated in clients with human immunodeficiency virus infection.
b. CD4 T-cell counts should be monitored before each dose and discontinued if the count falls below 250 cells/mL.
c. Risk of cancer is increased and the medication should not be administered to a client with a history of malignancy; medication should be discontinued if cancer develops.
d. Can cause chills, cough, pruritus, myalgia, and inflammation and pain at the intramuscular injection site
2. Ustekinumab (Stelara)
a. A human monoclonal antibody
b. Can decrease the activity of the immune system and increase the risk for certain types of cancer
c. Side effects of the medication include upper respiratory infections, headache, and tiredness.
d. Contraindicated in clients who have a history of cancer; also contraindicated in clients with infection, or reversible posterior leukoencephalopathy syndrome (rare condition that affects the brain and can cause death)
e. The client should not receive any live virus vaccines because the viruses used in some types of vaccines can cause infection in those with a weakened immune system; in addition, the HCP needs to be informed if anyone in the household needs a vaccine.
f. The client should not receive the bacille Calmette-Guérin (BCG) vaccine during the 1 year before taking or 1 year after taking the medication.
g. The client should inform the HCP if he or she is receiving phototherapy, has any other medical condition, is pregnant or plans to become pregnant, or is breast-feeding or plans to breast-feed.
E. Phototherapy
1. Coal tar and ultraviolet B irradiation: Treatment that involves the application of coal tar for 8 to 10 hours; coal tar is washed off and the area is exposed to short-wave UV radiation (ultraviolet B, or UVB)
2. Photochemotherapy (PUVA [psoralen and ultraviolet A] therapy)
a. Combines the use of long-wave radiation (ultraviolet A, or UVA) with oral methoxsalen (photosensitive medication)
b. Can cause pruritus, nausea, erythema; may accelerate the aging process of the skin; may increase the risk of skin cancer |