Sodium Isethionate is used as a placebo in medicine in the prophylaxis of Pneumocystis carinii pneumonia and is administered by aerosol (1).
Also used in research on insulin secretions in aging (2) in experiments on rats (3).
Other studies
Amended Safety Assessment of Isethionate Salts as Used in Cosmetics. Burnett CL, Heldreth B, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG Jr, Shank RC, Slaga TJ, Snyder PW, Andersen FA. Int J Toxicol. 2017 May/Jun;36(1_suppl):5S-16S. doi: 10.1177/1091581816685552.
Identification of isethionic acid and other small molecule metabolites of Fragilariopsis cylindrus with nuclear magnetic resonance. Boroujerdi AF, Lee PA, DiTullio GR, Janech MG, Vied SB, Bearden DW. Anal Bioanal Chem. 2012 Aug;404(3):777-84. doi: 10.1007/s00216-012-6169-2. Epub 2012 Jul 8.