# Xanax for Dogs: Uses, Dosing, and Safety Xanax is the brand name for alprazolam, a benzodiazepine medication that veterinarians sometimes prescribe to dogs for short-term, situational anxiety. The drug is not FDA-approved for veterinary use, which means any prescription is extra-label and must come from a licensed veterinarian who has examined your dog. Alprazolam is most often used for predictable, time-limited events such as thunderstorms, fireworks, veterinary visits, travel and crate confinement. It is not a long-term solution for separation anxiety or generalized anxiety disorder, and it is never appropriate to give a dog a pill from your own prescription. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## At a Glance | Feature | Detail | |--|--| | Active ingredient | Alprazolam (benzodiazepine class) | | Brand name | Xanax (human product) | | Species | Dogs, and off-label in cats with different metabolism | | Minimum age or weight | No veterinary label exists. A veterinarian sets eligibility case by case | | How it is given | By mouth, as a tablet or compounded liquid | | How fast it works | Clinical signs of accidental ingestion in dogs appear within 10 to 30 minutes [1] | | How long it lasts | Short-acting. Redosing intervals are set by the prescribing veterinarian | | Prescription status | Prescription only. Not FDA-approved for dogs. Extra-label use | | Main risks | Sedation, ataxia, paradoxical excitation, respiratory depression with other CNS depressants | ## What Xanax Is and What It Is Not Xanax is a human prescription product. The active molecule, alprazolam, belongs to the benzodiazepine family, a group of drugs that act at the limbic, thalamic and hypothalamic levels of the central nervous system [1]. Benzodiazepines produce anxiolytic, sedative, hypnotic, skeletal muscle relaxant and anticonvulsant effects [1]. That broad profile is why the same drug class shows up in anxiety treatment, seizure management and anesthesia protocols. For dogs, alprazolam is used almost exclusively as a situational anxiolytic. A veterinarian may prescribe it for a dog that panics during thunderstorms, trembles through fireworks, or becomes unmanageable at the clinic. One prospective clinical trial evaluated alprazolam alongside clomipramine and behavior modification for storm phobia in dogs, and the alprazolam dose in that study was 0.02 mg/kg by mouth, given as needed one hour before anticipated storms and every four hours as needed [2]. That figure comes from a published veterinary trial, not from a human dosing chart. It is one data point in one study population, not a universal prescription. What Xanax is not: it is not a cure for anxiety, it is not a substitute for behavior modification, and it is not a drug you can dose at home by guessing. It is also not the same as other benzodiazepines. Diazepam, midazolam, zolazepam and alprazolam all belong to the same class, but they differ in how fast they act, how long they last and how the dog's liver handles them. A veterinarian chooses among them based on the specific problem. ## How Alprazolam Works in Dogs Benzodiazepines enhance the effect of gamma-aminobutyric acid, or GABA, the brain's main inhibitory neurotransmitter. The drug binds to a specific recognition site on the GABA-A receptor and increases the flow of chloride ions into neurons, which dampens excessive electrical activity. This is the same mechanism that produces the anticonvulsant and anxiolytic effects seen across the class [3]. The class has real limitations. Long-term benzodiazepine use can trigger a functional uncoupling between the GABA-A receptor and the benzodiazepine recognition site, which contributes to tolerance and loss of efficacy over time [3]. The same source notes that ataxia, sedation, amnesia, potentiation of ethanol and barbiturates, tolerance, dependence and the potential for drug abuse all limit the clinical use of benzodiazepines for long-term treatment of epilepsy or anxiety [3]. That is the scientific reason veterinarians reserve alprazolam for short, predictable events rather than daily lifelong use. Alprazolam is metabolized by cytochrome P450 3A enzymes in the dog. Dog liver microsomes show activity toward alprazolam 4-hydroxylation, and this activity correlates with CYP3A protein and mRNA levels [4]. A separate study confirmed that alprazolam hydroxylation in dogs is primarily catalyzed by CYP3A12 with lower contributions from CYP3A26, and that canine CYP2B11 also contributes to benzodiazepine hydroxylation [5]. Individual dogs vary roughly twofold in these oxidation activities [4]. In practical terms, two dogs of the same weight can clear the same dose at different rates, which is one reason a veterinarian starts low and adjusts. ## What Alprazolam Is Used For in Dogs ### Noise Phobia and Storm Anxiety Storm phobia is the best-documented veterinary use of alprazolam in dogs. In the 2003 clinical trial, 40 dogs with storm phobia received clomipramine, alprazolam and a structured desensitization and counter-conditioning program [2]. Thirty of the 32 dogs that completed the study improved, and two caregivers considered the phobia resolved. Panting, pacing, trembling, staying near the caregiver, hiding, excessive salivation, destructiveness, excessive vocalization, self-trauma and inappropriate elimination all decreased significantly during treatment [2]. Improvement was greater during true storms with rain, thunder and lightning than during rain alone, and the improvement was maintained four months after the study ended [2]. That trial used alprazolam as one part of a three-part protocol. The drug did not work alone. Behavior modification was delivered at home using an audio simulation of storm sounds that had triggered fear during evaluation [2]. ### Situational Fear and Veterinary Visits A 2021 review of pre-appointment medications for dogs and cats identified alprazolam as one of four medications from four drug classes with published data for reducing acute situational fear and anxiety related to veterinary visits [6]. The other three were gabapentin, trazodone and oral transmucosal dexmedetomidine. The review covered use, mechanism of action and pharmacokinetics for each [6]. For a dog that panics in the car or the waiting room, alprazolam is a recognized option a veterinarian may consider. ### Capture and Handling Stress Alprazolam has been studied in Korean raccoon dogs, a wild canid species, for capture stress. Animals pretreated with oral alprazolam before being placed in a live trap showed decreased serum cortisol, while control animals showed increased cortisol [7]. This is a different species from the domestic dog, so the finding supports the general concept that alprazolam blunts stress hormone responses in canids. It does not establish a dose for pet dogs. ### What Alprazolam Does Not Treat Alprazolam is not a first-line treatment for canine epilepsy. Benzodiazepines have anticonvulsant properties, but tolerance, sedation and dependence limit their long-term use for seizure control [3]. A veterinarian managing epilepsy will typically choose a drug designed for chronic seizure treatment. Alprazolam is also not a stand-alone treatment for separation anxiety. The problem with separation anxiety is that it happens when the owner is absent, which means nobody is present to observe the dog's response and adjust the plan in real time. A veterinarian will usually pair any medication with a behavior modification plan and may choose a different drug class for daily coverage. ## Dosing: Why Only a Veterinarian Can Set It There is no FDA-approved alprazolam product for dogs. Every dose is extra-label and case-specific. The published veterinary figure from the storm phobia trial is 0.02 mg/kg by mouth, given as needed one hour before anticipated storms and every four hours as needed [2]. That number is useful context for understanding how veterinarians think about the drug. It is not a prescription. Several factors change the right dose for an individual dog: - **Body weight.** Milligram per kilogram dosing means a 5 kg dog and a 40 kg dog receive very different total milligrams. - **The trigger.** A dog that needs coverage for a two-hour thunderstorm may need a different plan than a dog facing a six-hour car trip. - **Onset timing.** In accidental ingestion cases, clinical signs developed within 10 to 30 minutes [1]. A veterinarian will time the dose relative to the event. - **Liver metabolism.** Individual dogs vary about twofold in CYP3A-mediated alprazolam oxidation [4], so response varies. - **Other medications.** Any drug that suppresses the central nervous system changes the risk profile. - **Age and health status.** Older dogs, dogs with liver disease and dogs with respiratory compromise need different handling. Never calculate a dose from a human prescription. Human Xanax tablets come in strengths designed for adult humans, and a tablet that is appropriate for a person can be a massive overdose for a small dog. The ASPCA Animal Poison Control Center reviewed 415 alprazolam ingestions in dogs, with 238 suspected toxicoses evaluated [1]. Clinical signs in those cases included ataxia and disorientation, depression, hyperactivity, vomiting, weakness, tremors, vocalization, tachycardia, tachypnea, hypothermia, diarrhea and increased salivation [1]. Those are the consequences of dogs getting human pills. ### Human Tablets Contain More Than Alprazolam Human Xanax tablets contain fillers, binders, coatings, colorants and sometimes other active ingredients in combination products. None of those excipients are selected for dogs. Some human formulations include xylitol, which is dangerous to dogs, and combination products may include other drugs that are toxic or that interact badly with medications your dog already takes. Even a plain alprazolam tablet carries the dosing problem described above. Splitting a human tablet to approximate a canine dose is not a safe strategy. ### Giving the Medication A veterinarian will tell you whether to give alprazolam with or without food, how far ahead of the trigger to dose, and what to do if the first dose does not work. Do not stack doses. Do not give a second dose early because the first one seemed weak. Do not combine alprazolam with other sedating drugs, including over-the-counter antihistamines, without explicit veterinary instruction. ## Side Effects and What to Do About Them ### Common and Expected Effects Sedation and ataxia are the signature benzodiazepine side effects. The class is associated with ataxia, sedation and amnesia, and these effects limit its clinical usefulness for long-term treatment [3]. In dogs that accidentally ingest alprazolam, ataxia and disorientation, depression and weakness are among the reported signs [1]. A dog that is slightly wobbly and sleepy after a prescribed dose is showing the expected pharmacology. A dog that cannot stand, is vomiting repeatedly or is breathing abnormally is not. ### Paradoxical Excitation Some dogs become more agitated rather than calmer on a benzodiazepine. In the accidental ingestion review, hyperactivity and vocalization were among the clinical signs observed [1]. Paradoxical excitation is one of the reasons a veterinarian may ask you to give a test dose at home on a quiet day before relying on the drug for a real event. If your dog becomes more anxious, more vocal or more restless after a dose, that is information your veterinarian needs. ### Respiratory and CNS Depression Benzodiazepines suppress the central nervous system. When combined with other CNS depressants, the effect compounds. The class is known to potentiate ethanol and barbiturates [3]. In an anesthesia study, diazepam significantly reduced the amount of isoflurane needed to maintain anesthesia in dogs also receiving fentanyl, with the fentanyl-diazepam combination producing a 74 percent reduction in isoflurane minimum alveolar concentration compared with 54 percent for fentanyl alone [8]. That study is about anesthesia, not home use, but it demonstrates the principle clearly: benzodiazepines add to the depressant effect of other drugs. A dog on alprazolam plus another sedating medication, or a dog with underlying respiratory disease, is at higher risk. ### What to Do If Something Goes Wrong If your dog received a prescribed dose and is excessively sedated, call your veterinarian. If your dog ate human Xanax or an unknown quantity, treat it as an emergency and contact your veterinarian or a pet poison control service immediately. In the published ingestion cases, treatment included standard decontamination such as inducing emesis and administering activated charcoal, and the specific benzodiazepine antagonist flumazenil may be used for severe CNS depression [1]. Flumazenil is a veterinary and emergency hospital drug. It is not something an owner can administer. ## The Comparison Table | Indication | Onset | Duration | Common Side Effects | Key Contraindications | |--|--|--|--|--| | Storm and noise phobia (adjunct to behavior modification) [2] | Signs of ingestion appear within 10 to 30 minutes [1] | Short-acting, redosed per veterinary instruction [2] | Sedation, ataxia [3] | Concurrent CNS depressants, respiratory compromise, known hypersensitivity | | Pre-visit situational fear [6] | Rapid, timed before the appointment [6] | Short-acting, matched to the visit length | Sedation, ataxia, paradoxical excitation [3][1] | Concurrent CNS depressants, hepatic impairment | | Capture or handling stress [7] | Rapid after oral dosing [7] | Short-acting | Sedation, ataxia [3] | Species and case specific, veterinary judgment required | | Long-term anxiety or epilepsy | Not recommended for chronic use [3] | Tolerance develops with prolonged use [3] | Tolerance, dependence, loss of efficacy [3] | Chronic use is limited by dependence and tolerance [3] | This table summarizes the pharmacology and the published uses. It does not replace a prescription. ## Which Dogs Should Not Receive Alprazolam A veterinarian will screen for the following before prescribing: - **Dogs on other CNS depressants.** Opioids, barbiturates, other benzodiazepines, some anesthetics and sedating antihistamines all add to the depressant load. The class potentiates ethanol and barbiturates [3], and the anesthesia interaction study showed a substantial additive effect with fentanyl [8]. - **Dogs with respiratory disease.** Brachycephalic breeds, dogs with collapsing trachea, laryngeal paralysis or chronic airway disease have less reserve. Any drug that suppresses respiration deserves extra caution. - **Dogs with significant liver disease.** Alprazolam is cleared by CYP3A-mediated oxidation in the liver [4][5]. Impaired liver function changes drug handling. - **Dogs with glaucoma or urinary retention issues.** Benzodiazepines can affect smooth muscle tone. A veterinarian will weigh the risk. - **Pregnant or nursing dogs.** There is no veterinary label covering this, and a veterinarian will assess the risk-benefit for the individual dog. - **Dogs with a history of paradoxical excitation on a benzodiazepine.** A previous bad reaction is a reason to choose a different drug. - **Dogs receiving imepitoin or other GABA-targeting drugs.** Imepitoin is a low-affinity partial agonist at the benzodiazepine site of the GABA-A receptor [9]. Combining drugs that act at the same receptor requires veterinary oversight. ## Drug Interactions to Know About Alprazolam is a CYP3A substrate in dogs [4][5]. Any drug that inhibits or induces CYP3A enzymes can change alprazolam levels. This includes a long list of human and veterinary medications. Your veterinarian needs a complete list of everything your dog takes, including supplements and over-the-counter products. The most important interaction category is other CNS depressants. The additive effect is not subtle. In the anesthesia study, adding diazepam to a fentanyl-isoflurane protocol cut the isoflurane requirement by 74 percent [8]. In a home setting, adding alprazolam to another sedating medication can tip a dog from calm into dangerously depressed. Opioids deserve specific mention. Fentanyl increased the effect of diazepam in the anesthesia study [8]. If your dog is on any opioid for pain, tell the prescribing veterinarian before starting alprazolam. ## Cats Metabolize Benzodiazepines Differently Cats are not small dogs. Benzodiazepine handling differs across species, and the published pre-appointment medication review covers both dogs and cats because the clinical questions are similar but the pharmacology is not identical [6]. Cats have different cytochrome P450 profiles and different glucuronidation capacity compared with dogs, which changes how long benzodiazepines persist in the body. Alprazolam is used in cats by some veterinarians, but the dose, the redosing interval and the side effect profile are not interchangeable with dogs. Never give a cat a dose calculated for a dog, and never give a cat a dose calculated for a human. ## Benzodiazepines and the Alternatives Alprazolam is one option among several for situational anxiety in dogs. The pre-appointment review identified gabapentin, trazodone, oral transmucosal dexmedetomidine and alprazolam as the four medications with published data for acute situational fear and anxiety at veterinary visits [6]. Each has a different mechanism and a different side effect profile. Imepitoin is a different approach entirely. It is a low-affinity partial agonist at the benzodiazepine binding site of the GABA-A receptor, licensed for canine epilepsy, with a fast onset of action in dogs and demonstrated anxiolytic properties in rodent models [10]. A case series of 20 dogs with fear and anxiety problems treated with imepitoin at approximately 10 mg/kg twice daily, adjusted as needed up to 30 mg/kg, alongside behavior modification, reported improvement over 11 to 19 weeks [10]. A separate survey of 85 owners of dogs with idiopathic epilepsy treated with imepitoin found no differences in five fear and anxiety measures between before and during treatment [11], so the anxiety benefit in epileptic dogs is not established. In rodent and dog models, imepitoin produced anxiolytic effects at doses not associated with sedation [9]. A 2024 pilot study using individualized dose titration from 10 to 30 mg/kg twice daily during storm season found significant decreases in anxiety scores at all three dose levels, with ataxia as the most common non-serious adverse event in 14 of 33 dogs and increased hunger in 13 of 33 [12]. No serious adverse events were reported [12]. The practical point is that alprazolam is not the only tool. A veterinarian may prefer a different drug for a dog that needs daily coverage, a dog that has had a bad reaction to a benzodiazepine, or a dog with a health condition that makes benzodiazepines risky. ## Why Self-Medicating Is Dangerous Giving your dog Xanax from your own prescription is one of the most common and most preventable medication errors in veterinary practice. The ASPCA Animal Poison Control Center reviewed 415 alprazolam ingestions in dogs over a 32-month period, with 238 suspected toxicoses evaluated [1]. Those cases happened because dogs got into human pills or because owners gave them. The specific dangers are: 1. **Wrong dose by a large margin.** Human tablet strengths are designed for adult humans. A 4 kg dog and an 80 kg human are not comparable. 2. **Fillers and combination products.** Human tablets contain excipients and sometimes additional active ingredients that are not intended for dogs. 3. **No health screening.** A veterinarian checks liver values, respiratory status and current medications before prescribing. You cannot do that at home. 4. **No monitoring plan.** A prescribed alprazolam trial includes instructions for what to watch and when to call. Self-medicating removes that safety net. 5. **Legal and regulatory issues.** Alprazolam is a controlled substance in the United States. Giving your prescription to an animal without veterinary authorization is not appropriate, and it creates a record problem if the dog has a reaction. If your dog has anxiety that you think needs medication, the correct first step is a veterinary appointment. Behavior modification is a component of every successful protocol in the published literature [2]. Medication supports the training. It does not replace it. ## Limitations and When to Contact a Veterinarian This article covers the published veterinary literature on alprazolam in dogs. It cannot tell you what is right for your individual dog. Only a veterinarian who has examined your dog, reviewed its history and knows its current medications can make that call. Contact a veterinarian promptly if any of the following occur: - Your dog ate a human Xanax tablet or an unknown quantity of alprazolam - Your dog is difficult to rouse, cannot stand or is breathing slowly or abnormally after a dose - Your dog becomes more agitated, more vocal or more restless after a dose - Your dog vomits repeatedly, has diarrhea or stops eating after starting the medication - Your dog's anxiety is not improving after the prescribed trial period - Your dog's anxiety is getting worse despite treatment - You are considering increasing the dose on your own - Your dog is scheduled for anesthesia or a procedure and is currently taking alprazolam - Your dog becomes pregnant or you are planning to breed her while on the medication For an accidental ingestion, call your veterinarian or a pet poison control hotline immediately. Do not wait for signs to develop. In the published cases, signs appeared within 10 to 30 minutes [1], and early decontamination is part of standard treatment [1]. ## Questions to Ask Your Veterinarian Bring these questions to your appointment: 1. Is alprazolam the right choice for my dog's specific trigger, or would another medication work better? 2. What exact dose should I give, and how do I measure it accurately? 3. How far before the trigger event should I give the first dose? 4. What is the earliest I can give a second dose if the event lasts longer than expected? 5. What side effects should I watch for, and which ones mean I should call you immediately? 6. Does alprazolam interact with anything else my dog takes? 7. Should I do a test dose at home before the real event? 8. What behavior modification plan should go alongside the medication? 9. How long should we try this before deciding whether it is working? 10. What is the plan if the first medication does not work? ## Frequently Asked Questions ### Can I give my dog Xanax? No, not without a veterinary prescription. Alprazolam is a prescription benzodiazepine, and giving your dog a human tablet without veterinary guidance risks overdose, interactions and serious side effects [1]. ### What is Xanax used for in dogs? Veterinarians use alprazolam for short-term situational anxiety, most commonly noise phobia such as thunderstorms, and for acute fear during veterinary visits, travel or handling [6][2]. ### How much Xanax can I give my dog? Only a veterinarian can set the dose. One published veterinary trial used 0.02 mg/kg by mouth as needed for storm phobia [2], but that is a study figure, not a prescription for your dog. ### How fast does Xanax work in dogs? Clinical signs of accidental alprazolam ingestion in dogs develop within 10 to 30 minutes [1]. A prescribed dose is typically timed about an hour before a predictable trigger event [2]. ### What are the side effects of Xanax in dogs? Sedation and ataxia are the most common effects [3]. Paradoxical excitation, vomiting, weakness, tremors, vocalization, tachycardia, tachypnea, hypothermia, diarrhea and increased salivation have been reported in accidental ingestion cases [1]. ### Can Xanax kill a dog? Alprazolam can cause severe central nervous system depression, and the risk rises when it is combined with other CNS depressants [3][8]. A dog that ingests human Xanax needs immediate veterinary care. ### Is Xanax safe for long-term use in dogs? No. Benzodiazepines carry risks of tolerance, dependence and loss of efficacy with prolonged use, which is why they are reserved for short-term or situational treatment [3]. ### Can I give my cat Xanax? Only with a veterinary prescription. Cats metabolize benzodiazepines differently from dogs, so doses are not interchangeable between species [6]. ## Related Articles - [Anesthesia Machine Safety Checks for Laboratory Animal Use](/knowledge/veterinary-medicine/laboratory-animal-science/anesthesia-machine-safety-checks-laboratory-animal-use) - [Prednisone for Dogs: Uses, Side Effects, and Safety Guidelines](/knowledge/veterinary-medicine/preventive-care/prednisone-for-dogs-uses-side-effects-and-safety-guidelines) - [Pharmacotherapy in Avian Medicine](/knowledge/veterinary-medicine/exotic-animal-medicine/pharmacotherapy-in-avian-medicine-dosing-routes-and-compounding-considerations-for-psittacines-and-p) - [Hypothyroidism in Dogs: Weight Gain, Lethargy and Thyroxine Dosing](/knowledge/veterinary-medicine/internal-medicine/hypothyroidism-in-dogs-weight-gain-lethargy-and-thyroxine-dosing) - [Can Cats Eat Valerian Root? Sedative Effect and Dosing](/knowledge/veterinary-medicine/toxicology-food-safety/can-cats-eat-valerian-root-sedative-effect-and-dosing) - [Ferret Care: Insulinoma hypoglycemia diet and prednisone dosing](/knowledge/veterinary-medicine/exotic-small-animals/ferret-care-insulinoma-hypoglycemia-diet-and-prednisone-dosing) ## Sources 1. [Accidental ingestion of alprazolam in 415 dogs.](https://pubmed.ncbi.nlm.nih.gov/11824768/) 2. [Use of clomipramine, alprazolam, and behavior modification for treatment of storm phobia in dogs.](https://pubmed.ncbi.nlm.nih.gov/12675296/) 3. [Anticonvulsant efficacy of the low-affinity partial benzodiazepine receptor agonist ELB 138 in a dog seizure model and in epileptic dogs with spontaneously recurrent seizures.](https://pubmed.ncbi.nlm.nih.gov/15461677/) 4. [Liver microsomal cytochrome P450 3A-dependent drug oxidation activities in individual dogs.](https://pubmed.ncbi.nlm.nih.gov/37144920/) 5. [Reevaluate In Vitro CYP3A Index Reactions of Benzodiazepines and Steroids between Humans and Dogs.](https://pubmed.ncbi.nlm.nih.gov/35351776/) 6. [A review of pre-appointment medications to reduce fear and anxiety in dogs and cats at veterinary visits.](https://pubmed.ncbi.nlm.nih.gov/34475580/) 7. [Effects of alprazolam on capture stress-related serum cortisol responses in Korean raccoon dogs (Nyctereutes procyonoides koreensis).](https://pubmed.ncbi.nlm.nih.gov/21368571/) 8. [Effects of diazepam and flumazenil on minimum alveolar concentrations for dogs anesthetized with isoflurane or a combination of isoflurane and fentanyl.](https://pubmed.ncbi.nlm.nih.gov/11327463/) 9. [Imepitoin Shows Benzodiazepine-Like Effects in Models of Anxiety.](https://pubmed.ncbi.nlm.nih.gov/30455643/) 10. [The use of imepitoin (Pexion™) on fear and anxiety related problems in dogs - a case series.](https://pubmed.ncbi.nlm.nih.gov/28610629/) 11. [Investigating the potential of the anti-epileptic drug imepitoin as a treatment for co-morbid anxiety in dogs with idiopathic epilepsy.](https://pubmed.ncbi.nlm.nih.gov/28388948/) 12. [Pilot Study on the Efficacy and Safety of Long-Term Oral Imepitoin Treatment for Control of (Thunder)Storm-Associated Noise Phobia/Noise Aversion in Dogs Using an Individualized-Dose Titration Approach.](https://pubmed.ncbi.nlm.nih.gov/38396513/)