The present invention, provides for a deuterium-enriched monoterpene or sesquiterpene such as perillyl alcohol, or a deuterium-enriched isomer or analog of monoterpenes or sesquiterpenes, such as isoperillyl alcohol. The present invention also provides for a deuterium-enriched derivative of a monoterpene or sesquiterpene, such as a perillyl alcohol carbamate or a deuterium-enriched derivative of an isomer or analog of a monoterpene or sesquiterpene, such as an isoperillyl alcohol carbamate. The deuterium-enriched derivative may be perillyl alcohol or isoperillyl alcohol conjugated with a therapeutic agent such as a chemotherapeutic agent. The present invention also provides for a method of treating a disease such as cancer, comprising the step of delivering to a patient a therapeutically effective amount of a deuterium-enriched compound.
