Displaying 15 results of Diltiazem Stable Isotopes Diltiazem stable isotopes are non-radioactive forms of the medication diltiazem, which is used to treat high blood pressure and certain heart conditions. These stable isotopes are chemically identical to the naturally occurring isotopes but have a different number of neutrons in their nucleus. They are commonly used in research to study the pharmacokinetics and metabolism of diltiazem and to develop more effective and safe treatments for cardiovascular diseases.