Pain & Anti-Inflammatory Medications for Dogs & Cats

This information is for educational purposes only. Never give your pet any medication — including over-the-counter human pain relievers — without your veterinarian's guidance. Many human pain medications are toxic to pets.

Pain medicines for dogs and cats are not one-size-fits-all. Your vet may choose different medications depending on whether your pet has arthritis, an injury, dental pain, nerve pain, cancer pain, or discomfort after surgery. In many cases, the safest plan uses multimodal pain control, which means combining medications that work in different ways so lower doses of each may be used.

The most common anti-inflammatory pain medicines in veterinary medicine are NSAIDs. These drugs help reduce inflammation and pain, especially with osteoarthritis and orthopedic problems. Dogs have several veterinary NSAID options, while cats have fewer labeled choices and often need closer monitoring because they process some drugs differently.

Other pain medications may be added when inflammation is only part of the problem. Your vet may recommend drugs such as gabapentin for nerve-related pain, tramadol in selected cases, short-term opioids after procedures, or newer monoclonal antibody therapies for osteoarthritis in some dogs and cats. The right plan depends on your pet’s age, species, kidney and liver health, other medications, and how severe the pain is.

If your pet seems painful, do not wait for obvious crying or limping. Cats often hide pain, and dogs may show it as slowing down, reluctance to jump, stiffness, panting, restlessness, or behavior changes. A medication that helps one pet can seriously harm another, so pain treatment should always be tailored by your vet.

Different pain medications target different parts of the pain pathway. NSAIDs reduce the production or action of inflammatory chemicals called prostaglandins, which helps decrease swelling, soreness, and stiffness. That is why they are often used for arthritis, soft tissue injury, and recovery after surgery.

Other medications work higher up in the nervous system. Gabapentin changes how pain signals are processed in nerves and the spinal cord, which can help with neuropathic pain or pain amplification. Amantadine may help when chronic pain has become more persistent and difficult to control. Opioids act on pain receptors in the brain and spinal cord and are usually used for stronger short-term pain relief.

Because pain is complex, your vet may combine therapies rather than relying on one drug alone. A pet with arthritis, for example, may do best with weight management, exercise changes, an NSAID or other prescription medication, and regular rechecks. The goal is not only to reduce pain, but also to improve comfort, mobility, sleep, appetite, and daily function.

All pain medications can have side effects, so monitoring matters. With NSAIDs, the biggest concerns are stomach upset, vomiting, diarrhea, decreased appetite, black or tarry stool, stomach ulceration, kidney injury, and less commonly liver problems. Risk can be higher in pets who are dehydrated, have underlying kidney or liver disease, are very young or very old, or are taking steroids or another NSAID at the same time.

With gabapentin, sleepiness and wobbliness are common, especially when starting treatment or increasing the dose. Tramadol may cause sedation, stomach upset, constipation, or agitation in some pets. Opioids can cause sedation, slowed breathing, constipation, and behavior changes. Cats may show side effects differently than dogs, so even subtle changes matter.

Before starting longer-term anti-inflammatory therapy, your vet often recommends baseline bloodwork and sometimes a urinalysis. Recheck testing may be advised after starting medication and then periodically for pets on ongoing treatment. This helps your vet catch problems early and adjust the plan if needed.

Call your vet promptly if your pet stops eating, vomits repeatedly, seems unusually tired, drinks or urinates much more, develops dark stool, acts disoriented, or seems worse instead of better. Do not add over-the-counter medications, supplements, or leftover prescriptions without checking first, because drug interactions are common.

Many human pain relievers are dangerous for pets, even in small amounts. Ibuprofen and naproxen can cause stomach ulcers, intestinal bleeding, kidney injury, neurologic signs, and death in dogs and cats. Acetaminophen is especially dangerous for cats and can damage red blood cells and the liver. Dogs can also develop liver injury and other serious toxicity from acetaminophen.

Even medications that sound familiar are not automatically safe because species process drugs differently. A dose made for a person may be far too strong for a cat or small dog. In addition, flavored liquids, combination cold medicines, topical creams, and gel capsules may contain extra ingredients that make exposure even more risky.

If your pet got into Advil, Motrin, Aleve, Tylenol, aspirin, or a pain cream, see your vet immediately. Bring the package or a photo of the label if you can. Do not try to make your pet vomit unless a veterinary professional specifically tells you to do so.

If the exposure happened after hours, contact an emergency clinic, ASPCA Animal Poison Control, or Pet Poison Helpline right away. Fast treatment can make a major difference.