I had not researched Cyclosporin A for Interstitial cystitis prior so felt I should..
A decent article is:
Neurourology and Urodynamics Volume 26, Issue 2, pages 267–270, March 2007
Potassium sensitivity test (PST) as a measurement of treatment efficacy of painful bladder syndrome/interstitial cystitis: A prospective study with cyclosporine A and pentosan polysulfate sodium†
Jukka Sairanen1,*, Teuvo L. J. Tammela2, Mikael Leppilahti3, Markku Onali4, Tapio Forsell5, Mirja Ruutu abstract here
i.e. 24/32 cases of the cyslosporin A responded = 75%
Comment – Cyclosporin A is an immunosuppressive. It is used in transplant cases where infections and kidney damage (especially in renal transplant cases) could become issues:
World Journal of Surgery Volume 10, Number 3, 348-360,
Complications of cyclosporin therapy
Barry D. Kahan, Stuart M. Flechner, Marc I. Lorber, Chris Jensen, Debbie Golden and Charles T. Van Buren abstract here
I suspect it would not be sanctioned unless Intra-bladder treatments failed. It does, however, offer a newer option.