Can Avacopan Replace Prednisone for GPA Treatment?

Avacopan (brand name Tavneos) is a significant advancement in treating severe active ANCA-associated vasculitis—specifically Granulomatosis with polyangiitis (GPA) and Microscopic polyangiitis (MPA)—that drastically reduces the need for prednisone ^[1][2]. However, it typically does not completely eliminate the need for steroids right away. Avacopan, which is an oral capsule taken twice daily, is known as a steroid-sparing medication, meaning it reduces the total amount of steroids you need over time ^[3][4]. While it allows patients to avoid the grueling long-term, high-dose prednisone taper, many people still require a brief, lower-dose course of steroids when they first start treatment to quickly calm the inflammation ^[5].

How Avacopan Changes Steroid Use

Historically, getting a GPA flare under control required taking high doses of prednisone for many months, followed by a slow taper. This approach is notorious for severe side effects like weight gain, bone loss, mood swings, and a higher risk of infection.

Avacopan works differently by directly targeting a specific part of the immune system that drives blood vessel inflammation ^[1]. In a major clinical trial called the ADVOCATE trial, researchers found that replacing the standard long-term prednisone taper with avacopan was just as effective at putting the disease into remission at 6 months ^[1]. Furthermore, patients taking avacopan were more likely to stay in remission at the one-year mark compared to those on the standard steroid taper ^[1]. Crucially, patients in the avacopan group experienced significantly less steroid-related toxicity ^[6][7].

When Might You Still Need Prednisone?

Even with avacopan in your treatment plan, you may still encounter situations where steroids are necessary:

• Initial Induction Therapy: When your disease is highly active, your doctor may prescribe a short course of steroids to quickly suppress the severe inflammation while avacopan and other medications take effect ^[3].
• Infusion Premedication: If you are receiving rituximab infusions alongside avacopan, you will likely be given a small dose of intravenous steroids right before the infusion to prevent an allergic reaction ^[5].
• Disease Flares: If your symptoms worsen unexpectedly, a short burst of steroids might be needed to regain control ^[3].

Understanding Avacopan’s Side Effects and Monitoring

While avacopan spares patients from many of the dreaded side effects of long-term prednisone, it is not without its own risks. Avacopan suppresses part of your immune system, which can increase the risk of serious infections ^[8].

Additionally, avacopan carries a risk of drug-induced liver toxicity ^[8][9]. Because of this, your doctor will require you to get regular blood tests to monitor your liver enzymes while you are taking the medication. If your liver enzymes become elevated, your doctor may need to adjust your dose or temporarily stop the medication.

Avacopan is a Team Player

It is important to understand that avacopan is not meant to be used by itself. It is an adjunctive therapy, meaning it is prescribed alongside other powerful immunosuppressant medications—most commonly rituximab or cyclophosphamide ^[10][11]. The combination of these medications works together to shut down the immune system’s attack on your blood vessels.

While avacopan may not be a 100% replacement for prednisone on day one, it successfully acts as a long-term replacement that spares patients from the most damaging, prolonged steroid side effects ^[6]. The duration of avacopan treatment varies; in clinical trials, patients typically took it for 52 weeks, but your rheumatologist will determine the best timeline for your specific situation ^[1].