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Dogs are commonly prescribed trazodone every 8 to 24 hours as needed, but the correct interval depends on the prescribed dose, your dog's health, other medications and the type of anxiety being treated. Do not give trazodone more often than the prescription label says. The Merck Veterinary Manual lists trazodone for dogs at intervals ranging from every 8 to 24 hours as needed. That range is not a schedule you should choose without veterinary advice.
Trazodone Frequency at a Glance
| Situation | Common veterinary approach |
|---|---|
| Fireworks, thunderstorms, travel or vet visits | Give before the predictable trigger, often about 1 to 2 hours beforehand |
| Short-term anxiety relief | May be prescribed as needed, often every 8 to 24 hours |
| Ongoing or daily anxiety | May be used regularly, sometimes with a longer-term anxiety medication |
| Missed dose | Skip it if the next dose is nearly due. Never give two doses together |
Trazodone usually begins working within about 1 to 2 hours. Its effects may last approximately 4 to 6 hours when it is used for situational anxiety, although dogs can respond differently.
Can I Give Trazodone Every 8 Hours?
Only if your veterinarian prescribed it that way. Every 8 hours is the shortest interval included in some veterinary dosing references, but your dog's schedule may instead be every 12 or 24 hours.
The interval can change based on your dog's age, body weight, liver or kidney disease, heart disease, sedation level and other medications.
Do not give an extra dose because your dog still seems anxious. Contact the prescribing veterinarian if the medication does not seem to last long enough.
How Should Trazodone Be Used for a Predictable Anxiety Trigger?
For fireworks, thunderstorms, car travel or a veterinary appointment, give trazodone before the event if your veterinarian has instructed you to use it that way. Waiting until a dog is already highly distressed may make the situation harder to manage. VCA Animal Hospitals describes trazodone as an as-needed option for expected fear triggers, while the Merck Veterinary Manual lists it as a medication for anticipated stressors.
Ask your veterinarian whether to test the first dose before an important event. You can then see whether your dog becomes calmly settled, too sleepy, uncoordinated or unusually agitated.
What If My Dog Is Still Anxious After a Dose?
Do not automatically repeat the dose. Trazodone can cause sedation, lethargy, vomiting, diarrhea, loss of coordination, agitation or increased anxiety. Your veterinarian may need to change the dose or timing, look for another medical cause or recommend a different treatment plan.
For frequent or unpredictable anxiety, a veterinarian may suggest a longer-term medication and behavior plan instead of relying only on repeated trazodone doses. The Merck Veterinary Manual distinguishes short-acting medications such as trazodone from maintenance medications used for ongoing anxiety.
Do Not Combine Trazodone Without Veterinary Advice
Tell your veterinarian about every medication, supplement and flea or tick product your dog receives. Trazodone can interact with medications that affect serotonin, including some antidepressants, tramadol, ondansetron, metoclopramide and monoamine oxidase inhibitors.
Combining drugs that affect serotonin can cause serotonin syndrome.
When Is Trazodone an Emergency?
An overdose or serious reaction needs immediate veterinary attention. Contact an emergency veterinarian if your dog has taken too much trazodone or develops:
- Extreme sleepiness, inability to stand or collapse
- Severe loss of coordination
- Repeated vomiting or diarrhea
- Agitation, restlessness, tremors or seizures
- Excessive panting, drooling or a high body temperature
- Dilated pupils, disorientation or difficulty breathing
These signs can indicate a serious adverse reaction or serotonin syndrome. VCA Animal Hospitals advises contacting a veterinary office immediately after a suspected overdose or adverse reaction.