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Onsior® Injection (active ingredient: robenacoxib) is a non-steroidal anti-inflammatory drug (NSAID) developed specifically for cats and dogs. It is part of the coxib class, meaning it selectively inhibits cyclooxygenase-2 (COX-2), the enzyme mainly responsible for inflammation and pain, while sparing COX-1 to reduce gastrointestinal side effects. Buy Onsior injection online

Key Features

Species-specific: Safe for use in cats and dogs only.

Fast-acting: Provides rapid relief of pain and inflammation.

Injectable form: Ideal for perioperative use when oral dosing isn’t practical.

Short half-life in blood but long-lasting effect at inflamed tissues (unique to robenacoxib).

Indications

Onsior Injection is used in veterinary medicine for:

Cats: Relief of post-operative pain and inflammation after orthopedic or soft tissue surgery.

Dogs: Relief of post-operative pain and inflammation associated with orthopedic surgery (such as cruciate ligament repair).

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 Dosage & Administration

Cats:

Dose: 2 mg/kg body weight, once daily.

Route: Subcutaneous injection.

Duration: Up to 3 days (single dose before surgery, then daily as needed).

Dogs:

Dose: 2 mg/kg body weight, once daily.

Route: Subcutaneous injection.

Duration: Up to 2 days.

Only administer under veterinary supervision. Not for use in animals under 2.5 kg or under 4 months old.

Benefits of Onsior Injection

Provides targeted pain relief for surgical patients
Short treatment course, minimizing risk of adverse effects
High safety margin compared to traditional NSAIDs
Can be used pre-operatively, intra-operatively, and post-operatively
Available in both injection and tablet form for flexible treatment

Side Effects & Precautions

Like other NSAIDs, Onsior may cause:

Vomiting, diarrhea, or decreased appetite

Lethargy

Rarely: kidney or liver complications in sensitive animals

Do not use in:

Animals with pre-existing gastrointestinal ulcers, liver or kidney disease

Pregnant, lactating, or breeding animals

In combination with other NSAIDs or corticosteroids

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 Storage

Store below 25 °C

Do not freeze

Use aseptic technique when drawing doses

Discard any unused portion after opening (follow product label instructions)

Onsior injection for cats

Onsior injection for dogs

Robenacoxib injection veterinary

NSAID injection for cats and dogs

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Summary:
Onsior Injection (robenacoxib) is a COX-2 selective NSAID designed for short-term management of post-operative pain and inflammation in cats and dogs. It is given subcutaneously at 2 mg/kg and provides effective, safe, and rapid pain relief during surgical recovery.

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Unlike traditional NSAIDs, Onsior belongs to the coxib class and selectively targets COX-2 enzymes—the primary mediators of inflammation and pain—while sparing COX-1 enzymes that protect the stomach and kidneys. This makes it a safer option for short-term surgical pain control. Buy Onsior injection online