Same Company, Completely Different Products
Here is something most patients do not know: Supartz FX and Durolane are both marketed by the same company, Bioventus, yet they could not be more different. Supartz is an avian-derived multi-injection product. Durolane is a non-animal single-injection product. Understanding why Bioventus offers both reveals important differences in how these products serve different patient needs.
Quick Comparison Table
| Feature | Supartz FX | Durolane |
|---|---|---|
| Manufacturer/Marketer | Bioventus | Bioventus |
| Source | Avian (rooster comb) | Bacterial fermentation (NASHA) |
| Bird allergy safe | No | Yes |
| Injections needed | 3-5 weekly | 1 |
| Volume per injection | 2.5 mL | 3 mL |
| Total volume | 7.5-12.5 mL | 3 mL |
| Molecular weight | 620-1,170 kDa | High (cross-linked NASHA) |
| Cross-linked | No | Yes (stabilized HA) |
| FDA approval | 2001 | 2015 |
| HCPCS Code | J7321 | J7318 |
| Duration | Up to 6 months | 6+ months |
| Self-pay cost | $600-$1,000 | $900-$1,300 |
What Is Supartz FX?
Supartz FX is a non-cross-linked, medium molecular weight sodium hyaluronate originally developed by Seikagaku Corporation in Japan. It has been FDA-approved since 2001 and uses a traditional avian (rooster comb) extraction process.
Supartz Advantages
What Is Durolane?
Durolane uses NASHA technology (Non-Animal Stabilized Hyaluronic Acid), producing HA through bacterial fermentation and then stabilizing it with minimal cross-linking. It is one of only two single-injection HA products that are not derived from animal sources.
Durolane Advantages
The Allergy Factor
This May Make Your Decision Automatic
Supartz FX is avian-derived and is not safe for patients with:
- Egg allergies
- Chicken or poultry allergies
- Feather allergies
Durolane is non-animal and is safe for all patients regardless of allergy status.
If you have any avian allergy, Supartz is ruled out. Durolane is one of only two non-avian options available in the US (the other is Euflexxa).
The Volume vs. Convenience Trade-Off
| Factor | Supartz FX (3-shot) | Supartz (5-shot) | Durolane |
|---|---|---|---|
| Total HA volume | 7.5 mL | 12.5 mL | 3 mL |
| Office visits | 3 | 5 | 1 |
| Total copays | $75-$150 | $125-$250 | $25-$50 |
| Time commitment | 3 weeks | 5 weeks | 1 day |
Supartz delivers 2.5 to 4 times more HA by volume, but whether this translates to better outcomes is debated. Durolane’s NASHA technology creates a stabilized gel designed to persist longer in the joint with less total volume.
Cost Comparison
| Factor | Supartz FX (3-shot) | Durolane |
|---|---|---|
| Drug cost (self-pay) | $600-$800 | $900-$1,300 |
| Medicare copays | $75-$150 | $25-$50 |
| Total with Medicare | $150-$300 | $100-$200 |
| Total self-pay | $675-$1,050 | $925-$1,350 |
Takeaway: Supartz FX is less expensive for self-pay patients. With Medicare, the copay savings from Durolane’s single visit narrow the gap considerably.
Making Your Decision
Choose Supartz FX if:
- You have no avian allergies
- Cost is a primary concern
- You prefer more total HA volume
- You can commit to 3-5 weekly visits
- You want the longer safety track record
Choose Durolane if:
- You have egg, chicken, or poultry allergies
- You prefer non-animal-derived products
- You want single-injection convenience
- You value potentially longer duration of relief
- Scheduling multiple visits is difficult
Frequently Asked Questions
Are Supartz and Durolane made by the same company?
Both are marketed by Bioventus in the US, but they are manufactured differently. Supartz was originally developed by Seikagaku in Japan (avian source). Durolane was developed by Q-Med/Galderma in Sweden (bacterial fermentation).
Which lasts longer?
Some data suggest Durolane may provide slightly longer relief (6+ months vs. up to 6 months), but this difference is small and varies by individual.
Can I switch from Supartz to Durolane?
Yes. Switching between products is safe and may be worthwhile if you want to try single-injection convenience or if you develop an avian allergy sensitivity.
Why would my doctor recommend one over the other?
Doctors consider your allergy status, scheduling ability, insurance coverage, and personal preference. Some physicians also have specific product experience that informs their recommendation.
The Bottom Line
Supartz FX and Durolane represent different eras and philosophies of viscosupplementation, now offered under the same corporate umbrella.
- Supartz FX: Affordable avian-derived series delivering the most total HA volume
- Durolane: Premium non-animal single shot with allergy safety and potentially longer duration
If allergies are a factor, Durolane wins by default. If cost drives your decision, Supartz FX is hard to beat. For everyone else, it comes down to how many office visits you are willing to make.
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