Onsior Cat (robenacoxib) 6 mg tablets

Onsior Cat is a veterinary prescription NSAID used to help control pain and inflammation in cats. This page explains key points about Onsior 6 mg tablets for cats, including common uses, dosing basics, and safety considerations. Ships from Canada to US, with cash-pay access for those without insurance, and the details below help set expectations for handling and monitoring.

Robenacoxib is a nonsteroidal anti-inflammatory drug (NSAID) that reduces inflammation-related discomfort. Like other NSAIDs, benefits and risks depend on the cat’s overall health, hydration status, and concurrent medicines. For broader browsing, see the Pet Medications category.

What Onsior 6 mg tablets for cats Are and How They Work

Onsior Cat contains robenacoxib, an anti-inflammatory analgesic (pain-reliever) used in veterinary practice. It works primarily by inhibiting cyclooxygenase (COX) enzymes involved in prostaglandin production, which contributes to swelling and discomfort. Robenacoxib is considered COX-2 selective in many species, meaning it targets an inflammation-associated pathway more than COX-1, though selectivity is not absolute and gastrointestinal (GI) or kidney risks can still occur.

We may contact the prescribing veterinarian to confirm prescription details. NSAIDs can be helpful for short-term inflammatory pain, but they should be used only under veterinary direction, especially in cats with kidney disease risk factors. Because cats can be sensitive to NSAID effects, label instructions and the prescriber’s plan matter more than extrapolating from other pet medicines.

Who It’s For

This medicine may be prescribed for cats needing short-term control of pain and inflammation, including peri-operative (around surgery) situations or acute flare-ups where an NSAID is appropriate. Some veterinarians also use robenacoxib for certain musculoskeletal pain conditions; site visitors looking for condition-specific hubs can review Feline Musculoskeletal Pain or Feline Osteoarthritis to browse related therapies.

Onsior 6 mg tablets for cats may not be suitable for every cat. NSAIDs are often avoided or used with extra caution in cats with current or prior GI ulceration, bleeding disorders, significant kidney or liver dysfunction, dehydration, or poor appetite. Use can also be more complicated in very young, frail, or underweight animals, and safety in pregnancy or nursing may be uncertain depending on local labeling. A veterinarian can weigh risks versus expected benefit and consider alternatives when needed.

Dosage and Usage

Dosing is determined by the veterinarian and should follow the local product label. In many settings, robenacoxib tablets are used once daily for a short course, such as several days, with duration depending on the indication and the cat’s clinical response. Because cats vary widely in size and sensitivity, tablet selection and timing should match the prescription rather than a generalized schedule.

Onsior 6 mg tablets for cats are typically administered by mouth. Tablets may be given with a small amount of food if allowed by the prescriber, and access to fresh water is important during NSAID therapy. For background context on labeled uses and how this medicine is commonly positioned in care plans, see the article Onsior Cat Uses.

Quick tip: Keep a simple log of doses, appetite, and stool quality.

Strengths and Forms

This product page focuses on the tablet presentation used in cats. In many markets, the feline tablet strength is 6 mg, and prescriptions specify the number of tablets and days of therapy. Pack sizes can vary by pharmacy supply chain and may include small course packs (for example, a few tablets) intended for short treatment periods.

Onsior 6 mg tablets for cats should be treated as prescription-only and cat-specific; dosing and safety information for canine NSAIDs or human pain relievers does not translate well to cats. Other robenacoxib presentations (such as solution or injectable forms) may exist in certain regions, but availability and indications differ. If a different form is prescribed, ensure the prescription matches that dosage form exactly.

Storage and Travel Basics

Tablets are generally stored at controlled room temperature in their original packaging to protect from moisture and light, following the label and pharmacy directions. Keeping tablets in the blister until use can help reduce humidity exposure and dosing mix-ups. Store out of reach of children and pets, since accidental ingestion of NSAIDs can cause serious adverse effects.

For travel, keep the medicine in the labeled container along with a copy of the prescription information when possible. Avoid leaving medications in hot cars or damp environments (such as a bathroom). If a dose is missed, the next step should be guided by the veterinarian’s instructions rather than doubling doses. For cats with chronic mobility concerns, the Arthritis In Dogs And Cats resource provides general education that can support non-medication planning.

Side Effects and Safety

Like other NSAIDs, robenacoxib can cause side effects, most often involving the gastrointestinal tract. Vomiting, reduced appetite, diarrhea, or lethargy may occur and should be taken seriously in cats, especially if signs persist. Onsior 6 mg tablets for cats can also be associated with more severe risks such as GI ulceration or bleeding, kidney injury (including worsening of underlying kidney disease), or liver enzyme elevations, depending on the cat’s baseline health and concurrent treatments.

Why it matters: Dehydration increases kidney risk with many NSAIDs.

Monitoring and when to seek help

Monitoring focuses on early recognition of intolerance and organ stress. Concerning signs can include repeated vomiting, black or tarry stools, blood in stool or vomit, marked decrease in eating or drinking, sudden weight loss, pale gums, unusual bruising, or pronounced weakness. Increased thirst or urination can also signal kidney stress in some cats. A veterinarian may recommend baseline and follow-up labs for cats with risk factors, especially if NSAID exposure extends beyond a very short course. Do not combine NSAIDs or add other pain relievers unless the prescriber has explicitly planned that combination.

Licensed Canadian pharmacies dispense the medication after referral processing. If any severe reactions are suspected, treatment decisions and reporting should be handled by a veterinary professional who can assess urgency and supportive care needs.

Drug Interactions and Cautions

Drug interactions with NSAIDs are clinically important. Robenacoxib is typically not used alongside other NSAIDs (including meloxicam) or corticosteroids (such as prednisone) because GI and kidney risks can increase. Caution is also common with medicines that affect kidney perfusion or hydration status, including certain diuretics and ACE inhibitors, as well as anticoagulants or antiplatelet therapies that may raise bleeding risk.

Medical history matters as much as the medication list. Kidney disease, dehydration, hypotension (low blood pressure), and pre-existing GI disease can shift the safety profile. If a cat is receiving other anti-inflammatory drugs for a different condition, a veterinarian may recommend a washout period between therapies. For broader NSAID class context (including why certain options are species-limited), see Deramaxx Safety Overview.

Compare With Alternatives

Veterinarians may consider other anti-inflammatory or pain-control options depending on the clinical goal, comorbidities, and prior response. Alternatives can include other NSAIDs, non-NSAID analgesics, and multimodal strategies such as weight management and environmental changes for mobility support. Differences between products often relate to approved indications, dosage forms, and how long they can be used safely in a given patient.

For example, meloxicam is another veterinary NSAID that is available in oral liquid forms in some markets; see Metacam Oral Suspension For Cats for the related listing. Some prescriptions may instead specify a robenacoxib liquid or other presentation; refer to Onsior Solution if that is what is written. Any switch between options should be directed by a veterinarian, with attention to washout timing and monitoring.

Pricing and Access

Costs for veterinary prescriptions can vary based on tablet count, prescribed duration, and dispensing pharmacy supply. For people comparing Onsior 6 mg tablets for cats, it can help to confirm whether the prescription is for a short course or a repeat plan, since refills and monitoring needs may differ. Packaging format may also affect per-course totals, particularly when small packs are used for post-procedure pain control.

Cash-pay access can be useful when pet insurance is limited. CanadianInsulin functions as a prescription referral service, and when required, documentation is verified before the medication is dispensed by a licensed Canadian pharmacy partner. If eligible programs are available at the time of ordering, details are listed on Program Details.

Authoritative Sources

For the most reliable safety and interaction information, use the product label provided with the prescription and follow the veterinarian’s instructions. Independent references can also help explain class-wide NSAID risks in animals, such as GI ulceration and kidney injury, and what warning signs may look like.

The sources below are broad veterinary references rather than individualized guidance. They can support informed discussions with a veterinary clinic about monitoring, contraindications, and concurrent medicines.

• FDA overview of NSAIDs for animals: Nonsteroidal Anti-inflammatory Drugs (NSAIDs) for Animals
• Merck Veterinary Manual summary of veterinary NSAIDs: Nonsteroidal Anti-inflammatory Drugs in Animals

For site actions, prescriptions and checkout details can be submitted for review; orders may use prompt, express, cold-chain shipping when needed.

This content is for informational purposes only and is not a substitute for professional medical advice.