tizanidine hydrochloride · Legacy · NDA 020397, 021447
Zanaflex
Earliest generic entry, as listed · earliest of 4 marketed strengths
Open now
No unexpired patents or exclusivities are listed for this product.
Listed patents · 0 unexpired
No unexpired patents listed.
Exclusivities · 0 unexpired
No unexpired exclusivities listed.
Paragraph IV certifications · 0
No Paragraph IV certification listed by FDA for this drug.
The list shows that a generic applicant certified to FDA that a listed patent is invalid or not infringed. It does not show litigation, settlements or launch timing.
Event history
No events yet. The first ingestion only records products entering their 12-month window; changes appear from the next Orange Book update.
Products covered · 5
| NDA · product | Form | Strength | Listed expiry |
|---|---|---|---|
| 020397 · 001 · RLD | tablet, oral | EQ 4MG BASE | open |
| 020397 · 002 · RLD · discontinued | tablet, oral | EQ 2MG BASE **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons** | open |
| 021447 · 001 · RLD | capsule, oral | EQ 2MG BASE | open |
| 021447 · 002 · RLD | capsule, oral | EQ 4MG BASE | open |
| 021447 · 003 · RLD | capsule, oral | EQ 6MG BASE | open |