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During pregnancy, the ideal would be to abstain from the use of any drug, at least during the first three months. In fact, none of the drugs currently used for the therapy of allergies has been classified by the FDA and European Commission on the basis of controlled human and animal studies as completely negative from the point of view of untoward effects in pregnancy. The following are considered comparatively safe: disodium cromoglycate, diphenhydramine, chlorpheniramine, hydroxyzine, mebhydroline, brompheniramine, inhaled beta 2-agonists, xanthine bronchodilators, pseudoephedrine, and topical nasal treatment with beclomethasone dipropionate in the last trimenon. On the contrary, specific immunotherapy is inadvisable. In the case of anaphylaxis, epinephrine and ephedrine are drugs of choice, while in asthma monitoring of PEFR is essential for appropriate management. For rhinitis, DSCG and beclomethasone diproprionate appear to he comparatively safe. For urticaria, hydroxyzine or possibly ephedrine should be preferred. In case of a history of untoward drug effects, oral antibiotics should be preferred (erythromycin or micamycin); for atopic dermatitis the preference is for topical treatment with hydrocortisone.