Displaying 17 results of Sildenafil Stable Isotopes Sildenafil Stable Isotopes are a group of isotopes that are chemically and physically identical to the regular Sildenafil molecule but have a unique atomic weight. These isotopes are used in scientific research to track and study the metabolism and pharmacokinetics of Sildenafil in living organisms. The stable isotopes provide a powerful tool for accurate and precise measurements of drug concentrations in biological samples, which can help researchers understand Sildenafil's mechanism of action and improve its therapeutic efficacy.