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February 10, 2012

Itch (cont.)

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What are oral itch treatments?

Traditionally, antihistamines are used to treat itch. Examples include diphenhydramine (Benadryl), hydroxyzine (Atarax), and chlorpheniramine (Chlor-Trimeton and others). These medicines can induce drowsiness in many people and must be used with care before driving a car or operating heavy machinery. Although antihistamines may help itch, they seem to do so mainly by helping people fall asleep and avoid scratching at night. If falling or staying asleep is not your main problem, one of the nonsedating antihistamines may be tried. Loratidine (Claritin) and fexofenadine (Allegra and others) are examples of newer second-generation antihistamines that are available OTC. The second-generation antihistamines do not have the sedating effects of the older first-generation antihistamines.

When should the doctor be consulted for itching?

If home treatment isn't helping, or you notice that scratching is affecting the skin being scratched (infection, lichenification [thickening and scarring], or pigmentation), or the itch is disturbing your sleep, you should consult a doctor to ascertain why you're itching. A doctor can also prescribe stronger cortisone-based creams (for eczemas and allergies) and prescription-grade antihistamines, if necessary, or treat the underlying condition that is causing the itch.

REFERENCES:

Butler, David F., and Jared J. Lund. "Pruritus and Systemic Disease." eMedicine.com. May 21, 2010. <http://emedicine.medscape.com/article/1098029-overview>.

United States. Centers for Disease Control and Prevention. "Cercarial Dermatitis." Nov. 2, 2010.<http://www.cdc.gov/parasites/swimmersitch/faqs.html>.

United States. National Cancer Institute. "Pruritus." Jan. 21, 2009. <http://www.cancer.gov/cancertopics/pdq/supportivecare/pruritus/Patient/page1>.


Last Editorial Review: 5/24/2011


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