Parsabiv generics — when can they launch?
Parsabiv (ETELCALCETIDE) · Kai Pharms Inc · 24 active US patents · 0 expired
Where Parsabiv sits in the generic timeline
Mid-term cliff: earliest active US patent for Parsabiv expires in 2030 (~4 years). Generic developers typically begin ANDA bioequivalence studies 3-4 years ahead of this date. Paragraph IV filings + Hatch-Waxman 30-month stays may shift the effective entry by another 18-36 months.
Under US Hatch-Waxman, a generic enters via an ANDA (Abbreviated New Drug Application) and may file with one of four Paragraph IV certifications attacking the brand's listed patents. If the brand sues within 45 days, a 30-month FDA approval stay is triggered. First Para IV filer typically gets 180-day market exclusivity.
Patent estate by type — active patents
Method-of-use patents only carve out specific indications; generics can launch with a "skinny label" omitting those uses. Composition-of-matter patents block the molecule itself.
- Method of Use — 9 patents
- Formulation — 9 patents
- Composition of Matter — 6 patents
FDA U-codes carved out by Parsabiv patents
Method-of-use patents are listed against specific FDA Patent Use Codes ("U-codes") representing carved-out indications. Generics can launch with a label that omits these uses.
| U-code | Description |
|---|---|
U-2014 | (no description) |
Sample patent estate
Showing 6 of 24 active US patents. View full estate on the Parsabiv drug page →
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This patent protects compounds that lower parathyroid hormone levels, which can be used to treat hyperparathyroidism, bone disease, and hypercalcemic disorders.USPTO title: Therapeutic agents for reducing parathyroid hormone levels
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This patent protects compounds that lower parathyroid hormone levels, which can be used to treat hyperparathyroidism, bone disease, and hypercalcemic disorders.USPTO title: Therapeutic agents for reducing parathyroid hormone levels
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This patent protects compounds that lower parathyroid hormone levels, which can be used to treat hyperparathyroidism, bone disease, and hypercalcemic disorders.USPTO title: Therapeutic agents for reducing parathyroid hormone levels
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This patent protects compounds that lower parathyroid hormone levels, which can be used to treat hyperparathyroidism, bone disease, and hypercalcemic disorders.USPTO title: Therapeutic agents for reducing parathyroid hormone levels
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This patent protects compounds that lower parathyroid hormone levels, which can be used to treat hyperparathyroidism, bone disease, and hypercalcemic disorders.USPTO title: Therapeutic agents for reducing parathyroid hormone levels
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This patent protects compounds for lowering parathyroid hormone levels and methods of using them to treat hyperparathyroidism, bone disease, and hypercalcemic disorders.USPTO title: Therapeutic agents for reducing parathyroid hormone levels
Sources
- FDA Orange Book — patents listed against Parsabiv (NDA filed 2017)
- Parsabiv drug profile — full patent estate, indications, clinical trials, pricing
- Kai Pharms Inc patent portfolio
- Patent cliff 2030 — every drug losing US exclusivity that year
Patent term extensions (PTR, pediatric exclusivity), Hatch-Waxman 30-month stays, and FDA regulatory exclusivity (NCE/ODE/PED) may shift the effective generic entry date. Not legal advice.
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