Linaclotide Legal Status: Approval, Research Use, and Regulatory Notes
FDA-approved (Linzess) since August 2012 for IBS-C and CIC. Marketed as Constella in Europe (EMA-approved 2012). Prescription required. Available worldwide in multiple markets.
Direct Answer
Linaclotide (Linzess) is FDA-approved for IBS-C and chronic idiopathic constipation, with robust Phase 3 data across multiple trials. It is one of the most prescribed GI peptide drugs in the US, with real-world data supporting its Phase 3 results. For guanylate cyclase-C agonism and IBS-C research, linaclotide is the established reference compound.
- Evidence grade
- Level A
- Research status
- FDA Approved
- Category
- Healing & Recovery
- Best for
- IBS-C, chronic idiopathic constipation, guanylate cyclase-C agonism, visceral pain modulation
Legal and Regulatory Status
FDA-approved (Linzess) since August 2012 for IBS-C and CIC. Marketed as Constella in Europe (EMA-approved 2012). Prescription required. Available worldwide in multiple markets.
Approval Stage
Linaclotide is listed as FDA Approved. Approved uses, if any, are indication-specific and do not automatically apply to other claims.
Compliance Notes
- Contraindicated in children under 2 years (risk of serious dehydration and death in neonatal mice)
- Avoid in patients 2 to less than 18 years old
- Contraindicated in known or suspected mechanical GI obstruction
- Discontinue if severe diarrhea develops
- Take on empty stomach for optimal absorption
Evidence Page
For the complete evidence review, see the main Linaclotide guide linked below.
Evidence Snapshot
| Evidence grade | Level A |
|---|---|
| Research status | FDA Approved |
| Best supported outcomes | IBS-C Symptom Relief (Level A), Chronic Idiopathic Constipation Relief (Level A), Visceral Pain Reduction (Level A), and Diarrhea (Adverse) (Level A) |
| Primary citation count | 3 |
| Last reviewed | 2026-04-04 |
Related Guides
How to Cite This Page
ExaminePeptides. "Linaclotide Legal Status: Approval, Research Use, and Regulatory Notes." Last reviewed 2026-04-04. https://examinepeptides.com/answers/linaclotide-legal-status/
This static answer page is built for fast indexing and direct citation. It summarizes the matching full evidence review and links back to primary sources where the source database includes them.