Cat Pain Medications in Cats

See your vet immediately if your cat seems painful, is hiding, crying out, breathing fast, limping, or will not eat. Cats are very good at masking discomfort, so pain can be easy to miss until it becomes more severe. Common veterinary pain medications for cats include prescription NSAIDs such as robenacoxib, opioids such as buprenorphine, and other options such as gabapentin or monthly frunevetmab injections for osteoarthritis. Which medication fits best depends on the source of pain, your cat’s age, kidney and liver function, and whether the problem is short-term or ongoing.

Cats are not small dogs, and they process many drugs differently. That is why human pain relievers can be dangerous or fatal in cats. Ibuprofen, naproxen, and acetaminophen are common examples of medications pet parents should never give unless your vet specifically directs it. In the United States, FDA-approved NSAID options for cats are limited, and even approved drugs are used carefully because cats can be more sensitive to kidney, stomach, and other adverse effects. Pain control is often multimodal, meaning your vet may combine more than one medication class to improve comfort while lowering the dose of each individual drug.

Cat pain medications work in different ways. NSAIDs such as robenacoxib reduce inflammation by blocking cyclooxygenase pathways involved in pain and swelling. They are often used for short-term pain after surgery and, in some cases, for carefully selected chronic pain situations under veterinary supervision. Opioids such as buprenorphine work on pain receptors in the nervous system and are commonly used for moderate to severe acute pain, especially after surgery, injury, or dental procedures. Buprenorphine is especially useful in cats because it can be absorbed through the tissues of the mouth when your vet prescribes the transmucosal form.

Other medications target different pain pathways. Gabapentin is often used for chronic or nerve-related pain and may also be part of osteoarthritis plans. Frunevetmab, sold as Solensia, is a monthly injectable monoclonal antibody approved by the FDA to control osteoarthritis pain in cats. Because pain has more than one pathway, your vet may recommend a layered plan, such as an opioid for immediate relief plus an NSAID or OA medication for ongoing control. This option-based approach can improve comfort without relying on one drug alone.

Side effects depend on the medication used. NSAIDs can cause vomiting, diarrhea, poor appetite, stomach ulceration, lethargy, and kidney injury. In cats, repeated meloxicam dosing carries a boxed warning from the FDA because extra-label repeated use has been associated with kidney failure and death. Robenacoxib is FDA-approved in cats for limited use, but more than three doses have not been shown to be safe on the approved label. Your vet may recommend bloodwork before or during treatment, especially for older cats or those with kidney, liver, or dehydration concerns.

Opioids such as buprenorphine may cause sedation, dilated pupils, euphoria, slowed breathing, constipation, or vomiting. Gabapentin commonly causes sleepiness, wobbliness, or reduced coordination, especially when first started or when doses are adjusted. Any pain medication can interact with other drugs or become riskier in cats with chronic kidney disease, liver disease, stomach ulcers, low blood pressure, or poor hydration. If your cat becomes weak, stops eating, vomits repeatedly, has black stools, or seems unusually sedated, contact your vet right away.

Pain medication dosing in cats must be individualized by your vet. Published veterinary references list robenacoxib at 1 mg/kg by mouth every 24 hours or 2 mg/kg by injection every 24 hours for limited labeled use, buprenorphine around 0.01 to 0.03 mg/kg by injection or transmucosal dosing every 4 to 8 hours depending on the product and situation, and gabapentin commonly around 3 to 10 mg/kg by mouth every 8 to 12 hours. These ranges are examples from veterinary references, not home dosing instructions. Your vet may adjust the plan based on the diagnosis, age, body weight, kidney values, and how your cat responds.

Administration matters as much as the dose. Some medications are given with food, while others may absorb differently if food is present. Liquid concentrations can vary, and compounded products may not match standard strengths. Never split, combine, or substitute medications without checking with your vet. If you miss a dose, give it only if your vet advises it is safe to do so. If you accidentally double-dose or your cat gets into human pain medicine, call your vet or a pet poison service immediately.

Drug interactions are a major safety issue with cat pain medications. NSAIDs should generally not be combined with corticosteroids such as prednisolone because the risk of stomach ulceration and other complications rises. NSAIDs also need caution with diuretics, ACE inhibitors, and other drugs that can affect kidney blood flow. If your cat is already taking medication for kidney disease, heart disease, inflammatory bowel disease, or asthma, your vet may need to change the pain plan or monitor more closely.

Sedating medications can also stack. Buprenorphine and gabapentin may increase drowsiness when used with other sedatives, anti-anxiety drugs, or anesthetic medications. This does not always mean they cannot be used together. In fact, combination plans are common in feline pain control. It does mean your vet should know every prescription, supplement, and over-the-counter product your cat receives. Even flea products, herbal products, and human medications in the home can matter when your vet is choosing the safest option.