What is the best medicine for dust mite allergy?

Avoidance: It depends on what symptoms are caused by dust mite allergy and exposure. Most common would be nasal syptoms (allergic rhinitis) and oral antihistamines or topical steroids or antihistamines are very effective. Dust mite exposure in allergic people also can contribute to allergic eczema (atopic dermatitis) and asthma. They are treated in the usual way. But best is to avoid dust mite exposure.

Depends: For overall control of symptoms caused by dust mites use environmental measures. Encase pillow, mattress & comforter with mite-proof covers, remove carpeting, & use a leather sofa. For nasal symptoms most-effective meds are topical steroid and antihistamine sprays. For asthma best meds are inhaled corticosteroids. For eczema moisturizers & calcineurin inhibitors (protopic, elidel) are best.