Dec 7, - Xanax is a drug that is used to treat anxiety and panic disorders. Warnings; Abuse; Uses; Side effects; Dosage; Interactions (Klonopin), lorazepam (Ativan), flurazepam (Dalmane), and others. . of an allergic reaction to Xanax: hives, difficulty breathing, and swelling of the face, lips, tongue, or throat. Apr 17, - Detailed Diphenhydramine dosage information for adults and children. Includes dosages for Insomnia, Allergic Rhinitis, Allergic Reaction and Missing: comparable. Dec 7, - 8 What are Ativan and Xanax interactions with other drugs? and sublingual tablets in doses of: mg, 1 mg and 2 mg and in the Studies showed that the efficacy of alprazolam and lorazepam are similar in reducing panic attacks and . Allergy and Cold preparations such as: Benadryl, Diabetic Tussin.