What Is Adequan and What Does It Treat?
Adequan Canine is an injectable prescription medicine used to treat osteoarthritis and degenerative joint disease (DJD) in dogs. Its active ingredient is polysulfated glycosaminoglycan (PSGAG), and importantly it is one of the few joint products that is actually FDA-approved for dogs rather than sold as a supplement.
Adequan is classed as a disease-modifying osteoarthritis drug. Rather than simply masking pain, it works inside the joint to support cartilage health. PSGAG is believed to inhibit the destructive enzymes that break down cartilage, support the production of healthy joint (synovial) fluid, and help maintain the cartilage matrix. The goal is to slow the progression of joint damage and improve comfort and mobility.
Veterinarians typically reach for Adequan for dogs with diagnosed osteoarthritis, dogs recovering from joint surgery, working and sporting dogs with joint wear, and breeds prone to hip or elbow dysplasia. It is frequently used as part of a multimodal plan alongside weight control, anti-inflammatory pain relief, oral joint supplements and controlled exercise.
Because Adequan is given by intramuscular injection, this calculator is primarily an educational tool: it shows the correct dose in milligrams and the volume to draw up, so you can understand and double-check your dog’s prescription. The injection itself must be given by your veterinarian, or by an owner who has been trained hands-on by the vet. For related options, see PuppaDogs’ guide to dog arthritis supplements and the glucosamine dosage calculator.
How the Adequan Dosage Calculator Works
Adequan dosing is refreshingly simple — it is based purely on body weight. The calculator:
- Applies the label dose of 2 mg per pound of body weight.
- Converts that into the volume to draw from the 100 mg/mL vial.
- Shows the injection schedule, either the standard initial course or a vet-individualised maintenance phase.
- Flags health considerations relevant to a drug with mild blood-thinning activity.
Enter your dog’s weight, choose the treatment phase, tick any health considerations, then press Calculate Dose.
How Adequan Doses Are Calculated for Dogs
The Label Dose and Schedule
The Adequan Canine label dose is:
2 mg per pound of body weight (4.4 mg/kg), by intramuscular injection, twice weekly for up to 4 weeks — a maximum of 8 injections in the course.
Adequan Canine is supplied as a 100 mg/mL solution, which makes the volume easy to work out:
Volume (mL) = body weight (lb) × 0.02 — in other words, about 1 mL per 50 lb of body weight.
The manufacturer specifically advises not to exceed the recommended dose or the recommended treatment regimen, and never to mix Adequan with other drugs or solvents in the syringe.
Maintenance Dosing
After the initial 4-week course, many dogs benefit from ongoing treatment. Some veterinarians continue Adequan at a reduced frequency — for example one injection every 2–4 weeks — as long-term maintenance. This maintenance use is individualised by the vet and falls outside the strict label protocol, so always follow your veterinarian’s specific instructions.
Adequan Dosage Chart for Dogs
This chart shows the per-injection dose and volume from the 100 mg/mL vial.
| Dog weight | Dose per injection | Volume to draw (100 mg/mL) |
|---|---|---|
| 10 lb (4.5 kg) | 20 mg | 0.2 mL |
| 25 lb (11 kg) | 50 mg | 0.5 mL |
| 50 lb (23 kg) | 100 mg | 1.0 mL |
| 75 lb (34 kg) | 150 mg | 1.5 mL |
| 100 lb (45 kg) | 200 mg | 2.0 mL |
How Adequan Is Given to Your Dog
- Route: Adequan Canine is given by intramuscular (IM) injection — into the muscle, not under the skin.
- Who gives it: Your veterinarian administers it, or trains you to do so. If you inject at home, follow the exact technique, needle size and injection sites your vet demonstrates, and rotate sites.
- Handling: Use a clean technique, draw up the exact volume, and never mix Adequan with any other medication in the syringe.
- Schedule: Keep to the twice-weekly rhythm during the initial course. Spacing injections roughly 3–4 days apart works well.
- Patience: Improvement builds over the course. Many owners notice better comfort, willingness to move and activity within the first few weeks, but a single injection is not a quick fix.
Side Effects and Safety
Adequan is generally very well tolerated. When side effects occur they are usually mild and may include temporary discomfort or swelling at the injection site or mild, transient digestive upset.
The most important safety point relates to blood clotting. PSGAG is chemically related to heparin and has mild anticoagulant (blood-thinning) activity. For that reason, Adequan should be used with caution — and sometimes avoided — in dogs that:
- Have a known or suspected bleeding disorder
- Are taking blood-thinning medication
- Are scheduled for surgery in the near future
- Have impaired kidney or liver function
- Have a known hypersensitivity to Adequan or PSGAG
Always give your veterinarian a full health and medication history before starting, and report any unusual bruising or bleeding.
How Adequan Fits Into Arthritis Care
Adequan is one tool in a bigger picture. The most effective arthritis plans are multimodal and may also include:
- Weight management — keeping your dog lean is one of the single most powerful ways to reduce joint load.
- Pain relief — prescription anti-inflammatory medication or newer options such as Librela and Galliprant.
- Oral joint support — glucosamine and chondroitin supplements.
- Controlled exercise and physiotherapy — to maintain muscle and joint range of motion.
Your veterinarian will combine these based on your dog’s stage of disease.
Treatment Duration and Monitoring
The labelled initial course is 4 weeks (8 injections). After that, your vet will reassess your dog’s comfort and mobility and decide whether to move to a maintenance schedule, repeat a course later, or adjust the overall arthritis plan. Monitor your dog’s willingness to walk, jump and climb stairs, and report changes — better or worse — at recheck visits.
Conclusion
Adequan Canine is a genuine, FDA-approved, disease-modifying treatment for canine osteoarthritis, dosed simply at 2 mg per pound (about 1 mL per 50 lb) by intramuscular injection, twice weekly for up to 4 weeks. The calculator above gives you the dose and the exact volume to draw, so you can understand and verify your dog’s prescription. Because it is an injectable medicine with mild blood-thinning activity, Adequan should always be prescribed by your veterinarian and injected by the vet or a properly trained owner — ideally as one part of a complete, multimodal arthritis plan.
Frequently Asked Questions
How much Adequan should I give my dog?
The Adequan Canine label dose is 2 mg per pound of body weight, given by intramuscular injection. Because the product is 100 mg/mL, that works out to 0.02 mL per pound, or about 1 mL per 50 lb. The standard course is twice weekly for up to 4 weeks (a maximum of 8 injections). Always follow your veterinarian’s exact prescription.
How is Adequan given to dogs?
Adequan Canine is given by intramuscular (IM) injection – into the muscle. It is administered by your veterinarian, or by an owner who has been trained hands-on by the vet. It should never be mixed in the same syringe with other drugs, and the labelled dose and schedule should not be exceeded.
How long does Adequan take to work in dogs?
Adequan works gradually rather than instantly. Benefits build over the 4-week course, and many owners notice improved comfort, mobility and activity within the first few weeks of twice-weekly injections. It is not a fast-acting painkiller, so it is often combined with other arthritis treatments while it takes effect.
What are the side effects of Adequan in dogs?
Adequan is generally very well tolerated. Side effects are uncommon and usually mild, such as temporary tenderness or swelling at the injection site or brief digestive upset. Because Adequan is related to heparin and has mild blood-thinning activity, it should be used cautiously in dogs with bleeding disorders, those on blood thinners, or those facing surgery.
Can I give my dog Adequan at home?
Yes, many owners give Adequan injections at home, but only after their veterinarian has prescribed it and provided hands-on training in the correct intramuscular injection technique, needle choice and injection sites. If you are not confident, your veterinary clinic can give the injections instead.
Can Adequan be used long term for arthritis?
The labelled course is twice weekly for 4 weeks, but many veterinarians continue Adequan afterwards at a reduced frequency, such as once every 2-4 weeks, as long-term maintenance for chronic arthritis. This maintenance use is individualised and off-label, so the schedule should be set and reviewed by your veterinarian.
References & Further Reading
The dosing ranges and safety information on this page are drawn from the following veterinary references. Always defer to your own veterinarian and the manufacturer’s label for your specific product.
- Adequan Canine (polysulfated glycosaminoglycan) – FDA-approved prescribing information and product label. adequancanine.com.
- U.S. FDA Center for Veterinary Medicine. Freedom of Information Summary, Adequan Canine (NADA 141-038).
- Plumb DC. Plumb’s Veterinary Drug Handbook. 10th ed. Hoboken, NJ: Wiley-Blackwell, 2023 – polysulfated glycosaminoglycan monograph.
- Merck Veterinary Manual. Osteoarthritis (degenerative joint disease) in dogs – disease-modifying agents. merckvetmanual.com.
- PuppaDogs. Dog Arthritis Supplements for Pain Relief. puppadogs.com.
