Cyclosporine

What it's for

Cyclosporine (ciclosporin) is an FDA-approved ring-shaped peptide medicine used to quiet parts of the immune system — mainly to help prevent organ transplant rejection and treat selected autoimmune conditions (eye drops/emulsions are used for dry eye, depending on the product).

What it does for the body

It prevents organ transplant rejection and treats selected autoimmune conditions; ophthalmic emulsions treat dry eye. Specific products have distinct labels. People often hear about it through clinics, forums, or news — this guide sticks to what published research and regulators actually support.

What it targets

It targets a helper protein inside immune cells (cyclophilin) and blocks calcineurin, a switch that normally turns on IL-2 (an immune messenger that helps T-cells ramp up) and activates T-cells. Dialing that down reduces the immune attack that can reject a transplant or drive some autoimmune disease.

Research context

Bottom line for readers: Cyclosporine has a defined FDA-approved story. Use the citations tab to open labels and trial registries, and treat anything beyond the label as unverified.

Studied for (literature interest)

• Immune research interest (educational tag)

Cautions (educational)

• Educational only — not medical advice.
• DrPep does not offer medical consultations, dosing guidance, suppliers, or peptide sales.

Citations / starters

• FDA search: Cyclosporine — FDA.gov search
• ClinicalTrials.gov search: Cyclosporine — U.S. clinical trials registry
• Drugs@FDA search: Cyclosporine — FDA drug database (if approved)
• PubMed search: Cyclosporine — NCBI PubMed
• PubMed Central search: Cyclosporine — NCBI PMC

Reference

No ref on file.