| Active ingredient | Antivenin (Latrodectus mactans) |
|---|---|
| Strength | NLT6000U |
| Dosage form | For Injection |
| Route | Intravenous |
| Modality | Biologic |
| FDA approval | February 1936 |
| Marketing status | Rx |
Source: FDA Purple Book, layered on the CliffBio company graph. Cliff dates are the projected — 12-year biologic exclusivity estimate; estimates are projections, not legal advice.