Cyclosporine is a pharmaceutical substance that is also known by its generic name, ciclosporin. Its chemical name is (E)-cyclo[(2S,3R,4R)-3-hydroxy-4-methyl-2-(methylamino)-6-octenoyl]-L-2-aminobutanoyl-N-methylglycine. The CAS number for cyclosporine is 59865-13-3.

Cyclosporine is primarily used as an immunosuppressant drug. It works by suppressing the immune system to prevent rejection of transplanted organs. It is commonly prescribed to organ transplant patients to help prevent their bodies from rejecting the new organ.

Additionally, cyclosporine is used to treat certain autoimmune disorders like psoriasis, rheumatoid arthritis, and a severe form of dry eye disease called keratoconjunctivitis sicca. In these conditions, cyclosporine helps to reduce inflammation and improve symptoms.

Cyclosporine is available in various forms such as capsules, oral solution, and injection, depending on the specific treatment requirements. It is typically administered under the supervision of a healthcare professional due