Abstract: Disclosed are methods of treating a subject having a disease or disorder by administering a monoamine oxidase inhibitor in combination with a serotonin receptor agonist, which in some embodiments is a deuterated serotonin receptor agonist. In some aspects, the disclosure further relates to pharmaceutical compositions and kits comprising a monoamine oxidase inhibitor and a serotonin receptor agonist. In some embodiments, the monoamine oxidase inhibitor is a MAO-A-selective inhibitor such as CX157, and the serotonin receptor agonist is a serotonin 2A receptor agonist such as N,N-dimethyltryptamine (DMT), or deuterated DMT.

Abstract: Disclosed are methods of treating a subject having a disease or disorder by administering a monoamine oxidase inhibitor in combination with a serotonin receptor agonist, which in some embodiments is a deuterated serotonin receptor agonist. In some aspects, the disclosure further relates to pharmaceutical compositions and kits comprising a monoamine oxidase inhibitor and a serotonin receptor agonist. In some embodiments, the monoamine oxidase inhibitor is a MAO-A-selective inhibitor such as CX157, and the serotonin receptor agonist is a serotonin 2A receptor agonist such as N,N-dimethyltryptamine (DMT), or deuterated DMT.