Xanax Opposite Effect | OvernightPharmacy Welcome to the Alaska Internet Xanax Opposite Effect Travel Guide , your Alaska travel planning assistant on the web. Browse hundreds of Alaska vacation options, request information as needed, and build the perfect vacation itinerary for your upcoming Alaska trip. Find patient medical information for Xanax Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Side Effects of Xanax for Dogs Though Xanax can be useful in helping to control your dog’s anxiety and the accompanying symptoms, usage doesn’t come without some serious side effects. The most common side effect reported by pet owners appears to be sleepiness. Also, in some cases, Xanax can have opposite effects on dogs can cause them to experience heightened levels of excitement (and sometimes heightened levels of anxiety). Whenever starting a new medication, particularly a mood altering medicine like Xanax, it is imperative that you keep a close eye on any and all behavioral changes. Understand the possible side effects of Xanax and report any. Find information about common, infrequent and rare side effects of Xanax Oral. To avoid these withdrawal effects, it is best to put your pet on minimal dose of Xanax that too for a shortest possible duration. Keep in mind that Xanax is not a first line of treatment for anxiety in dogs. Xanax (alprazolam) is a benzodiazepine medication used to treat anxiety and panic disorders. Includes side effects, interactions and safety information. Includes side effects, interactions and safety information. For the Consumer. Applies to alprazolam: oral solution, oral tablet, oral tablet disintegrating, oral tablet extended release. Along with its needed effects, alprazolam (the active ingredient contained in Xanax) may cause some unwanted effects. A paradoxical reaction or paradoxical effect is an effect of medical treatment, usually a drug, opposite to the effect which would normally be expected. An example of a paradoxical reaction is pain caused by a pain relief medication. An increase in the number of neurons that are associated with neurotransmitters that produce the opposite effects of Xanax, referred to as upregulation. Significant alterations in the pathways of the so-called reward center of the brain associated with the reinforcing effects of the drug, leading to positive associations with use of the drug.