Displaying 7 results of Riociguat Stable Isotopes Riociguat is a potent and selective soluble guanylate cyclase (sGC) stimulator that is used to treat pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension. Riociguat stable isotopes are isotopically labeled forms of riociguat that are used for pharmacokinetic and metabolic studies. These stable isotopes allow for the precise measurement of drug levels in biological samples, helping to improve drug development processes and patient outcomes.