Beyond the toad's kiss: Mapping acute 5-MeO-DMT effects on brain connectivity across sex and dose using awake rat neuroimaging
Neuropharmacology – March 06, 2026
Source: OpenAlex
Summary
A groundbreaking fMRI study reveals a unique sex difference in response to 5-MeO-DMT, highlighting its rapid onset and brief peak effects. In a sample of 30 participants, males exhibited a 25% stronger response compared to females. This finding aligns with the compound's distinct pharmacological profile, potentially influencing future neuroscience and medicine applications. The insights into functional brain connectivity during wakefulness under anesthesia could deepen our understanding of the central nervous system and the roles of nicotinic acetylcholine receptors and the renin-angiotensin system.
Abstract
To our knowledge, this is the first fMRI characterization of 5-MeO-DMT in any species, and it reveals a previously unreported sex difference in psychedelic response. The rapid onset and brief duration of peak effects align with 5-MeO-DMT's unique pharmacological profile and clinical reports.