Adequan®: One of the Most Underused Arthritis Treatments in Veterinary Medicine

When most people think about arthritis treatment, they think about pain medications.

While pain control is incredibly important, some treatments work differently.

Adequan® Canine (polysulfated glycosaminoglycan, or PSGAG) is one of the few FDA-approved veterinary medications designed to help support joint health—not just relieve pain.

It's a medication I've used frequently in practice, and for many dogs, it can become an important part of a long-term arthritis management plan.

What Is Adequan?

Adequan is an injectable medication given into the muscle.

Unlike NSAIDs, which primarily reduce inflammation and pain, Adequan works within the joint itself.

Research suggests it may:

• Help protect remaining cartilage
• Reduce enzymes that break down cartilage
• Support healthy joint fluid
• Decrease inflammation within the joint
• Improve mobility over time

It's important to understand that Adequan does not rebuild severely damaged cartilage or cure arthritis. However, it may help slow the progression of joint degeneration while improving comfort.

How Is It Given?

Adequan is typically started with a loading series of injections.

The FDA-approved protocol is:

• Two injections per week for four weeks (a total of eight injections)

After the initial series, many veterinarians transition to a maintenance schedule.

Depending on the individual dog, this might mean:

• Every two weeks
• Once monthly
• Another schedule based on how the patient responds

Many owners are taught to give the injections at home, making long-term treatment convenient and less stressful for both them and their pet.

Which Dogs Benefit Most?

I've found Adequan particularly helpful for dogs with:

• Early arthritis
• Moderate osteoarthritis
• Hip dysplasia
• Elbow dysplasia
• Dogs beginning to show stiffness
• Dogs that need additional support alongside NSAIDs or Librela®

In my experience, the earlier we introduce Adequan in appropriate patients, the more likely we are to preserve their comfort and mobility over the long term.

What Does the Research Say?

Adequan has been studied for decades.

Clinical studies have demonstrated improvements in:

• Lameness
• Joint mobility
• Pain
• Overall function

While no medication works for every patient, Adequan has one of the strongest evidence bases among injectable arthritis therapies used in general practice.

It is also one of the few treatments specifically approved for canine osteoarthritis.

Is It Safe?

Overall, Adequan has an excellent safety profile.

Most dogs tolerate the injections very well.

Possible side effects include:

• Mild soreness at the injection site
• Temporary swelling
• Rare digestive upset
• Rare allergic reactions

Because Adequan can have mild effects on blood clotting, veterinarians may use additional caution in pets with bleeding disorders or before certain surgical procedures.

Can Adequan Be Combined with Other Treatments?

Absolutely.

One of Adequan's greatest strengths is that it works well as part of a multimodal arthritis management plan.

It is commonly combined with:

• Weight management
• Physical rehabilitation
• NSAIDs
• Librela®
• Joint supplements
• Home modifications
• Exercise programs

Because it works differently than many pain medications, it often complements—rather than replaces—other therapies.

My Perspective

Adequan is one of those medications that I think sometimes flies under the radar.

It isn't flashy.

It isn't new.

But over the years, I've seen many dogs become more comfortable, move more freely, and maintain a better quality of life while receiving regular Adequan injections.

Is it a miracle cure?

No.

Will every dog respond the same way?

Also no.

But if I have a dog with arthritis—especially one in the earlier stages of disease or one needing additional support beyond pain medication alone—Adequan is absolutely one of the treatments I consider.

For many of my patients, it's become a reliable part of helping keep them active for as long as possible.

Adequan® at a Glance

How it works: Injectable polysulfated glycosaminoglycan (PSGAG) that helps protect cartilage, support joint fluid, and reduce cartilage breakdown.

Best candidates: Dogs with early to moderate osteoarthritis, hip or elbow dysplasia, or those needing additional support alongside other arthritis therapies.

Evidence: ⭐⭐⭐⭐⭐ (Excellent. Decades of clinical use and research support its role in canine osteoarthritis.)

Typical Cost: $$–$$$ (Initial loading series followed by lower-cost maintenance injections.)

Invasiveness: Low (Simple intramuscular injections that many owners can learn to administer at home.)

My Recommendation: One of my favorite long-term arthritis therapies. While it isn't a cure, I believe Adequan is an underutilized treatment with an excellent safety profile that can make a meaningful difference for many dogs, especially when started early and combined with a comprehensive arthritis management plan.