LEVONORGESTREL
| Brand name | MIRENA |
|---|---|
| Active ingredient | LEVONORGESTREL |
| Strength | 52MG |
| Dosage form | SYSTEM |
| Route | INTRAUTERINE |
| Modality | Small molecule |
| FDA approval | December 2000 |
| Marketing status | RX |
| Patent | Expires | Type |
|---|---|---|
| 10561524 | September 2029 | use U-2948 |
| 11850182 | September 2029 | product |
Source: FDA Orange Book, layered on the CliffBio company graph. Cliff dates are the latest FDA-listed patent expiry; estimates are projections, not legal advice.