Displaying 1 results of Risdiplam Stable Isotopes Risdiplam is a small molecule drug used for the treatment of spinal muscular atrophy (SMA). Stable isotopes of risdiplam are used in research studies to track and understand the pharmacokinetics and metabolism of the drug. These isotopes, which have the same number of protons and electrons but differ in their number of neutrons, allow for accurate and precise measurements of drug concentrations in biological samples. This information can be used to optimize dosing regimens and improve the efficacy and safety of risdiplam.