Onsior® Tablets for Cats

What Onsior Is and How It Works

Onsior® is a prescription nonsteroidal anti-inflammatory drug for cats. It helps manage short-term pain and swelling after routine feline surgeries. This page explains how it works, dosing basics, safety guidance, and US delivery from Canada, plus ways to pay if you purchase without insurance.

Border Free Health connects U.S. patients with licensed Canadian partner pharmacies; prescriptions are verified with prescribers before dispensing.

The active ingredient is robenacoxib, a COX-2 selective NSAID. It targets pathways that drive pain and inflammation. The treatment is designed for brief courses under veterinary direction, aligning with official labeling. It is typically given once daily for a few days, often around a procedure, to support comfort as your cat recovers.

See more background on perioperative comfort in our guide Onsior Cat Medicine Support and learn practical monitoring tips from Your Cat In Pain.

Who It’s For

This medicine is for veterinarian-directed control of postoperative pain and inflammation in cats. It may be used around orthopedic procedures or common soft tissue surgeries. Cats should be healthy enough for NSAID therapy. Kittens under typical label thresholds and very small cats may not be eligible. Cats with dehydration, kidney disease, stomach ulcers, or liver problems often require extra caution.

Onsior cat medicine should not be used with other NSAIDs or corticosteroids. Your prescriber will review your cat’s history, current medicines, and recent lab work before deciding if the therapy is appropriate.

Dosage and Usage

Follow your veterinarian’s exact directions. Tablets are commonly given once daily for a short course around surgery, with a small amount of water if needed. Give on an empty stomach when possible, as labels often recommend dosing away from meals. If your cat spits out a dose, do not re-dose until your veterinarian advises. Never exceed the prescribed duration.

Typical administration tips include offering the tablet by hand, using a pill pocket, or placing the pill at the back of the tongue followed by gentle throat rubbing. Observe your cat after administering to ensure the dose was swallowed. Keep a simple log of dosing day and time to avoid double dosing. If anything seems off, contact your clinic for guidance.

Strengths and Forms

Onsior 6 mg tablets are the standard feline presentation. Packaging may vary by market, and availability can change over time.

Tablets are film-coated and sized for cats. The form is designed for short-course use, typically tied to surgical timing. Because supply can differ, your prescriber may adjust the plan or consider an alternative if your preferred form is temporarily unavailable.

Missed Dose and Timing

If a dose is missed, give it when you remember unless it is close to the next scheduled time. Do not double up. Keep doses evenly spaced as directed for the brief treatment window. Contact your veterinarian if multiple doses are missed or if vomiting occurs right after dosing.

Storage and Travel Basics

Store tablets at room temperature in the original blister until use. Protect from moisture and direct light. Keep away from children and pets. When traveling, carry the prescription label or a copy of clinic instructions. Use a sealed container and keep tablets dry. For longer trips, pack extra doses in case of schedule changes. If your itinerary involves airline travel, carry medicines in hand luggage and retain a printed prescription to avoid delays.

Dispose of unused tablets according to local guidance. Do not flush unless instructions say otherwise. If you need to return or discard unused medicine, ask your clinic or a pharmacist about pet-safe disposal options.

Benefits

This therapy can reduce postoperative discomfort so your cat is more willing to move, rest, and eat. Because it is COX-2 selective, it may focus its action on pain and inflammation pathways while sparing some protective functions. The tablets are small and given once daily for a short period, which many caregivers find manageable.

Robenacoxib for cats 6 mg is aligned with label-directed surgical recovery support. When used as prescribed, it may help your cat get comfortable during the immediate post-surgery period.

Side Effects and Safety

• Digestive changes: vomiting, soft stool, diarrhea, decreased appetite
• Behavior changes: lethargy, restlessness, or unusual hiding
• Mouth or throat irritation if the tablet lodges briefly

Serious effects are uncommon but possible. Seek veterinary help promptly for blood in stool, persistent vomiting, black tarry stool, jaundice, severe lethargy, trouble breathing, or reduced urine output. Cats are sensitive to NSAIDs. The risk can be higher in dehydrated cats or those with kidney, liver, or gastrointestinal disease. Use only under a veterinarian’s direction.

Drug Interactions and Cautions

Tell your veterinarian about all medicines and supplements your cat takes. Avoid using this therapy with other NSAIDs or corticosteroids. Use caution with diuretics, ACE inhibitors, anticoagulants, or other drugs that may affect the kidneys, stomach, or liver. Cats should be well hydrated before and after anesthesia, and your clinic may monitor labs when appropriate. Do not use in pregnant or lactating cats unless a prescriber determines the benefit outweighs the risk.

What to Expect Over Time

Caregivers often notice improved comfort during the first days after surgery. Appetite and activity may gradually normalize as pain is controlled. Continue to follow your clinic’s rest and activity plan, and use any additional comfort measures your veterinarian recommends. If pain appears uncontrolled, call your clinic before giving any additional medicines, especially over-the-counter products.

Compare With Alternatives

Some cats may receive an injectable option around surgery or when oral dosing is difficult. Onsior injectable for cats is used by veterinarians for perioperative control under clinic oversight.

Another NSAID used in cats is Metacam® Oral Suspension For Cats. Your clinician may choose an option based on procedure type, your cat’s health, and dosing practicality. If a tablet is not ideal, your prescriber may recommend a clinic-administered formulation or a liquid alternative.

Pricing and Access

See current options and explore ways to save compared to typical local rates. Canadian pharmacy pricing can provide value for eligible prescriptions, with careful procurement and pharmacist review. Ships from Canada to US for qualifying orders with valid prescriptions.

Onsior Canadian pricing varies by package size and availability. Check the product page for real-time details and see our Promotions page for occasional coupon updates. Payment occurs through a secure checkout, and pharmacists may contact your clinic to verify details when needed.

Availability and Substitutions

If your preferred presentation is out of stock, your prescriber may suggest a suitable alternative. Options depend on your cat’s medical history, procedure type, and the expected duration of therapy. We do not guarantee restock dates. Your clinic can advise on the most appropriate substitute if a temporary shortage occurs.

Patient Suitability and Cost-Saving Tips

This treatment is not right for every cat. Cats with kidney disease, dehydration, stomach ulcers, or liver problems may require different pain control strategies. Kittens under label weight or age limits should not receive this medicine. Tell your clinician about past reactions to any NSAID before starting this therapy.

To manage costs, consider multi-month planning for pets needing staged procedures, and coordinate refills ahead of time. Store tablets correctly to prevent waste. Set reminders on your phone for each dose during the short course. If your veterinarian anticipates future procedures, ask about consolidating the prescription to reduce per-fill fees and courier costs.

Questions to Ask Your Clinician

• Is this NSAID appropriate for my cat given their labs and history?
• How long should my cat take the tablets after surgery?
• Should I give the dose with food or on an empty stomach?
• What signs mean I should stop and call the clinic?
• Which medicines or supplements should I avoid during therapy?
• Would an injectable option be better for my cat?

Authoritative Sources

Elanco (Manufacturer)FDA DailyMedHealth Canada DPD

Pain and Pet Medications resources can help you learn more about related care topics.

Ready to proceed? You can add this medicine to your cart for US shipping from Canada with prompt, express shipping. Always follow your veterinarian’s instructions. This information is educational and not a substitute for professional advice.