Cystine
As of the edition of 20 October 2026, Cystine is a small molecule: marketed, first approved in 1959 (ES).
Sources: FDA Orange Book and Purple Book, other approval registers, ClinicalTrials.gov, ChEMBL.
The drug
- Status
- Marketed; latest approval 1987
- Kind
- Small molecule
- Brand name
- Priorin N
- First approved
- 1 September 1959 (ES)
- Approvals on record
- 3 in 3 regions
- Holder of the most recent approval
- Fresenius Kabi; 3 holders in all
- Registered trials
- 1, 0 stopped early
- Disease areas
- Chemically induced; Mental health
US protection
No US approval on record.
With no US approval on record there are no listed US patents or exclusivities.
This is the US only.
Registered trials
| Phase | Trials | Completed | Active | Stopped early |
|---|---|---|---|---|
| Phase 3 | 1 | 0 | 1 | 0 |
| All trials | 1 |
Who has held its approvals
| Company | Role | Years |
|---|---|---|
| Bayer | Applicant | 1963 to now |