Strassman and Gallimore on DMT

The Clinical Opening

In 1990, psychiatrist Rick Strassman received federal approval for clinical research with DMT at the University of New Mexico. The approval followed five years of negotiation. The Food and Drug Administration and Drug Enforcement Administration supplied federal oversight. The university’s General Clinical Research Center and hospital ethics committee also reviewed the work. The committee had never approved administering a Schedule I psychedelic to human volunteers.

Strassman’s program reopened American clinical research with classical hallucinogens after the suspension of the early 1970s. Over five years, he administered more than four hundred doses to sixty healthy adult volunteers. DMT is N,N-dimethyltryptamine, a short-acting compound in the tryptamine family. His dose-response work measured its movement through the body and its effects under defined clinical conditions. The selected studies established tolerability within those conditions.

The research also accumulated accounts of what volunteers experienced. Strassman brought those accounts to a wider audience in DMT: The Spirit Molecule, published in 2001. The book helped reopen public discussion of psychedelic experience after prohibition. Clinical measurements and the experiences they accompanied now appeared within one accessible account.

The book reached two audiences with different expectations. Strassman’s scientific colleagues encountered a psychiatrist reporting experiences that exceeded his original pharmacological question. Underground communities recognized features they had discussed for decades. Institutional credentials had carried that material into public view.

The selected dose-response cohort had prior psychedelic experience. Strassman’s 1994 dose-response study involved eleven experienced hallucinogen users. That selected cohort differs from the sixty-person program as a whole. Recurrence across their accounts cannot establish that no shared cultural expectations shaped the reports. The recurring features remain the clinical problem even after this distinction is made.

Stephen Szára’s Hungarian investigations had established DMT’s intense effects in the late 1950s. Strassman’s reports concerned more than intensity. Volunteers described entering locations that felt more real than the clinical room. They encountered non-human entities that appeared autonomous and communicated with them. A description of altered visual processing alone left the encounter’s structure unexplained.

Strassman had expected dose-dependent changes in perception, emotion, and cognition. The apparent inhabitants unsettled that expectation. Accounts of encounter demanded categories beyond diffuse mystical feeling or distortion of familiar surroundings. His later writing followed the methodological problem produced by those reports.

He developed the idea of DMT as a conduit, an opening to dimensions ordinarily excluded from waking perception. That interpretation departed from the production model in which the brain generates every perceived feature. His book explained how a psychiatrist trained within that model had come to consider access to another territory. The clinical measurements established the altered state; the interpretation addressed what that state admitted.

The Phenomenology

Strassman’s supervised high-dose protocol delivered approximately 0.4 milligrams per kilogram of body weight through an intravenous bolus. A volunteer reclined in a darkened clinical room as the dose entered over a short interval. Reports describe an onset within seconds. The 1994 dose-response report recorded peak blood levels and subjective effects within two minutes. Effects were negligible by thirty minutes. The swift decline made sustained investigation difficult.

Volunteers described losing contact with the room and entering a perceptually distinct location. Some reported no bodily sensation of traveling between the two environments. The transition changed what appeared to surround them while the clinical body remained in place. Perception acquired another environment through a measurable intervention in the embodied instrument.

Those locations varied in detail but shared recurring features. Elaborate geometry organized colors and textures outside the volunteer’s ordinary experience. Participants often described greater vividness and apparent reality than they associated with the clinical room. The distinction concerned the quality of experience itself. Familiar waking perception had ceased to supply their highest measure of what felt real.

Accounts also describe retained autobiographical identity and heightened cognitive clarity. Volunteers remembered who they were and that they had received a drug. Their assessment of the encountered place changed without necessarily erasing that knowledge. Subjective duration expanded beyond the minutes recorded in the room. Reported clarity and altered time therefore require separate description from measured performance.

The apparent inhabitants communicated and responded in ways volunteers experienced as interpersonal. Some appeared humanoid; others resembled machines or communicating geometric configurations. Communication also occurred without ordinary speech. Participants distinguished these encounters from the movement of their own familiar thoughts. Apparent autonomy belongs to the report; independent agency requires a further test.

Strassman recognized parallels with alien-abduction accounts, near-death experiences, and mystical encounters. Different routes into altered perception disclosed related kinds of inhabited territory. The 2026 preprint cites an analysis of 3,778 trip reports in which about 45 percent included entity encounters. Their recurrence gives the encounter a history beyond one compound or research program. It also raises questions about the interface shared by those routes.

The contrast between production and access remains consequential. DMT acts through serotonin receptors, including 5-HT2A, and changes visual and emotional processing. A production account locates the entire encounter within altered neural activity. An access account treats that change as an opening through which another source becomes perceptible. Both accounts must explain the encounter’s organization and apparent response.

Strassman left the source question open. He resisted treating the production account as a conclusion already forced by the clinical data. Refusing to investigate an independent source establishes a methodological boundary before the experiment begins. The encounter’s vividness supplies the problem; a test must distinguish the agency operating through it.

Gallimore and the Engineered Encounter

British neurobiologist Andrew Gallimore brought chemistry, neuroscience, and pharmacology to the duration problem. His 2006 Cambridge doctorate examined the biogenesis of terrestrial and marine polycyclic ethers. His later computational work examines how molecular and neural processes support states of consciousness. At the Okinawa Institute of Science and Technology, he worked within computational neuroscience. Strassman’s accounts connected receptor-level questions with an experience that appeared to replace the waking world.

Gallimore developed that problem through papers and his 2019 book, Alien Information Theory. A brief incursion gives the volunteer little time to examine the encountered environment. Return interrupts observation before the territory’s regularities become clear. Gallimore asked how to keep the opening available for sustained inquiry. Engineering the observation window became part of investigating the source.

In 2016, Gallimore and Strassman published a model for target-controlled intravenous infusion. Strassman’s 1994 blood-sampling data supplied its pharmacokinetic foundation: measurements of concentration over time. An initial dose would establish the state, and a modeled infusion would compensate for elimination. The proposal adapted technology used to maintain anesthetic concentrations during surgery.

The model distinguishes central blood circulation from transfer into peripheral tissues. It estimates a plasma target intended to stabilize brain exposure. The calculation connects delivery, distribution, and elimination with the duration of the observation window. Blood concentration remains the measured carrier; the effect-site concentration is modeled.

DMT is rapidly metabolized, including through monoamine oxidase. Its quick onset and short duration make concentration control consequential. The 2016 proposal also relied on the absence of obvious acute psychological tolerance in repeated-bolus studies. Its simulations described a prolonged state suitable for observation and imaging. A model for hours of access remained distinct from a completed human trial.

Later work established a sustained research window with a different delivery implementation. Lisa Luan and colleagues published their extended-DMT study online in October 2023. Eleven screened volunteers received a bolus followed by a constant-rate infusion over thirty minutes. The authors measured intensity, anxiety, heart rate, and plasma concentration. Effects settled below the initial peak and remained relatively stable during infusion.

The study also collected retrospective ratings of immersion and entity encounters. Encounter ratings increased late in the higher-dose sessions. Those ratings describe reported experience; they do not establish that one independently identified entity remained present throughout the interval. The study demonstrated extended access and tolerability within its selected clinical sample. The proposed target-controlled algorithm and the tested constant-rate method remain distinct.

Plasma concentrations rose while subjective intensity plateaued. The authors considered acute psychological tolerance or habituation, with substantial variation between participants. This later finding qualifies the earlier repeated-bolus result without identifying receptor adaptation as its measured cause. Sustaining subjective intensity requires attention to the person’s response as well as the concentration curve.

The extended window changes what research can attempt. Repeated prompts and longer observation become possible while the experience continues. The interval supports investigation of continuity, communication, and response to a task. Those investigations must supply their own results. Engineering access creates the conditions for inquiry rather than completing it.

Gallimore connects the altered interface with Aldous Huxley’s reducing valve in The Doors of Perception. The reducing valve limits consciousness to the range compatible with embodied survival. DMT changes the restriction and admits content ordinarily excluded from waking awareness. The resulting territory has structure, apparent inhabitants, and recurring relations.

The filter account gives the chemical intervention a direction. Embodied reception changes; a larger field acquires experiential form; the returning volunteer carries an account into ordinary life. The opening deserves investigation as access to territory. Extended-state DMT supplies time in which the participant can examine what the ordinary interface excludes.

The Pineal Question

Strassman also investigated the relation between administered DMT and the body’s own chemistry. Researchers had identified endogenous DMT, produced within mammalian tissue, since the 1960s. His later proposal assigned the pineal gland a special role. He associated possible release with birth, dying, trauma, and profound meditation.

That proposal differed from the direct clinical observations of administered DMT. It concerned the source and timing of production inside the body. Barker and colleagues detected DMT in living rat pineal dialysate in 2013. Dean and colleagues, including Strassman, investigated brain production and concentrations in 2019. The distinction between animal measurement and human function matters at each step.

Dean’s experiments measured DMT in rat cortical microdialysate, fluid sampled from the brain’s extracellular environment. Baseline concentrations fell within published extracellular ranges for serotonin, norepinephrine, and dopamine. Serotonin measured in the same rat samples exceeded DMT, while occupying the same nanomolar range. Experimentally induced cardiac arrest increased cortical DMT with and without an intact pineal gland. Cortical concentrations showed no significant difference between pineal-intact and pinealectomized rats, at baseline or following cardiac arrest. The result moves the question beyond a single secretory organ.

The study also examined INMT messenger RNA, associated with an enzyme involved in DMT synthesis. RNAscope detected human INMT expression in the cerebral cortex, pineal gland, and choroid plexus. Rat cortex and hippocampus also showed colocalized INMT and AADC transcripts, associated with the two enzymes needed for DMT synthesis. Gene expression does not itself measure an active human DMT surge or its experiential effect. The compound’s distribution and function require distinctions between species, tissue, measured concentration, and perceptual consequence.

A distributed pathway changes the shape of the question. Endogenous DMT belongs within inquiry into ordinary brain function as well as exceptional thresholds. A local chemical event can change access through the embodied instrument. That relation connects the entheogenic opening with the death threshold without making a rat concentration result a complete explanation of either.

The connection reaches into near-death experience research. Strassman’s proposal joins altered chemistry with the traditions’ descriptions of perception at dying. If endogenous concentrations produce a perceptual opening, they supply one bodily carrier of that transition. The condition concerns a particular physiological mechanism, not the standing of spiritual encounter itself.

Reports of veridical perception during near-death experiences retain their separate question. A chemical account of vividness cannot establish how a person acquires information beyond ordinary access. The embodied opening and the information received through it demand different tests. A common threshold can carry both without reducing one to the other.

Source, Interface, and Territory

DMT changes the interface through which experience appears. Perception, emotion, remembered identity, temporal organization, and the boundary between observer and world acquire different relations. What becomes significant also changes. The recurring encounter class warrants investigation because those changes repeatedly include apparent inhabitants.

Several processes can supply structured encounter. The brain can generate person-like models under unusual pharmacological conditions. Archetypal structures can acquire autonomous and immersive form. A shared imaginal field becomes available through altered reception. External agency interacts through the changed interface. Different sessions can combine more than one source.

The working formula preserves those relations:

agency × interface × operator × context → experienced form

The operator is the person who receives and interprets the encounter. Context includes preparation, expectations, and surroundings. An external agent still appears through the person’s perceptual repertoire. An internally generated form can also feel independent of its maker. Experienced externality and identified external agency therefore remain different propositions.

Recurring morphology establishes a stable grammar of encounter: forms and relations that repeatedly appear together. That grammar does not identify the speaker. The person returns with a report shaped by both what appeared and how perception rendered it. Investigation must distinguish those contributions without discarding the encounter.

Terence McKenna described machine elves before later surveys catalogued related features. Autonomous-seeming agents occupied impossible environments and communicated through performances of extreme novelty. The recurrence supplies continuity across the encounter literature. Hidden information, cross-session continuity, and effects independent of expectation supply tests of a source beyond that continuity.

Gallimore, Hoffman, and the Traces of the Other

In May 2026, Gallimore, Niffe Hermansson, and Donald Hoffman presented Traces of the Other: Are DMT Entities Real? Hoffman is a cognitive scientist at the University of California, Irvine. His conscious realism makes interacting consciousness fundamental. Their preprint applies that formal approach to the DMT encounter and proposes experiments.

The formal theory gives an independent agent a defined place in the question. It does not establish that every reported entity occupies that place. A mathematical account can specify what contact would mean and what observations would discriminate it. The proposed experiment connects that account with the altered human interface.

Conscious agent theory represents an agent with seven components. Three spaces describe experience, possible actions, and world states. Three Markov kernels describe perception, decision, and action. A kernel specifies probabilities of transitions between states. A step counter orders those transitions. This structure gives interaction an explicit mathematical form.

The qualia kernel, Q = D·A·P, describes transitions between experiential states. Perception connects a world state with experience; decision connects experience with a selected action; action changes the world state. Their composition describes how experience develops through the cycle. Conscious interaction becomes a sequence with specified relations rather than an undefined exchange of influence.

Hoffman’s interface theory distinguishes useful perception from a transparent picture of reality. A desktop icon gives a user access to a computer’s operations without displaying its underlying circuitry. Evolution shapes perception through fitness consequences. The fitness-beats-truth results compare perceptual strategies under defined evolutionary models. They give survival-oriented interfaces a mathematical advantage over the veridical strategies tested within those models.

A trace is another agent’s activity as it enters the perceiving agent’s experience. Agent B acts on world states through its own decision and action kernels. Agent A’s perception kernel determines which consequences become experiential updates for A. The resulting trace reflects B’s dynamics through A’s interface. It need not resemble B’s internal organization.

Imperceptibility follows when A’s kernel does not register the states B influences. B continues to act while A receives no coherent appearance of that activity. Spatial distance alone does not explain this absence. Changing reception changes which dynamics acquire perceptible form. The distinction gives normally unseen agency a precise relation to an observer.

The JPEG analogy makes the decoder’s role visible. A photo application renders the file as an image. A word processor renders the same data as unfamiliar symbols. What the interface can organize determines what appears meaningful. Agents in the inhabited ecology act through a field whose contents exceed ordinary human perception.

The authors connect DMT with a change in that perceptual organization. Their Consensus Reality Space names the stable range of ordinary experiential dynamics. Evolution maintains that range as a basin of attraction, toward which experience repeatedly returns. Altering the kernel admits structure outside that familiar basin. Normally imperceptible activity then gains a form the altered observer can receive.

A Markov polytope describes the range of possible transition structures. For an experience space with ten states, the geometric object has ninety dimensions and ten billion vertices. Each point describes a different probabilistic transition arrangement. The vertices mark deterministic choices among those arrangements. The calculation concerns possible dynamics, not a counted population of entities. It shows how little of the mathematical space one familiar interface occupies.

The relation clarifies reports of higher-dimensional geometry. An interface arranged around three spatial dimensions struggles to display dynamics outside that arrangement. Reorganization changes the form in which the content appears. Non-Euclidean environments and dimensions beyond three belong to the reported encounter. Their appearance concerns reception as well as the territory received.

Extreme complexity carries the same relation. A being’s operation appears extraordinary when the observer lacks the dimensions needed to represent it simply. A Flatlander sees a three-dimensional rotation only through changing planar sections. The amplituhedron supplies a mathematical analogy: particle-scattering relations become simpler in an abstract space than in their spacetime expression. This analogy explains a representational change; it does not identify a measured physical carrier of the DMT entity.

Andrés Gómez-Emilsson of the Qualia Research Institute describes another class of encounter. He reports entities maintaining four-color map assignments on complex surfaces through rapid transformations. The account presents apparent computation beyond what the observer can consciously perform. A controlled constraint-satisfaction task would distinguish a compelling appearance from verified performance. The computational question survives through that distinction.

The hallucination comparison asks why unfamiliar agents and environments recur with such elaborate organization. Dreams and other hallucinatory states also draw on learned models, but the DMT class repeatedly exceeds familiar human and animal scenes. The preprint describes human figures as appearing in fewer than five percent of the experiences reviewed in its cited literature. That estimate belongs to those reporting contexts, rather than every possible session. Structural novelty demands an explanation of how the interface generates or admits the form. Calling the result hallucination assigns an origin without completing that explanation.

The authors propose hidden-information tests during an extended-state session. In one design, a computer in another room changes randomly between states, such as blue and yellow screens. A cooperative external agent’s responses would need to track the concealed variable. The subject’s account alone cannot supply that relation. Repeated performance above the specified chance expectation would carry a different evidentiary weight. The design depends on an entity that cooperates and has access to the variable.

Other single-subject probes concern dynamical complexity. Tasks ask whether a reported agent maintains global constraints while several transformations occur together. A task can also interrupt a structured process and test whether it resumes without supplied cues. The task needs specified constraints and a way to assess the reported performance. These visual probes still depend on the subject’s account of what occurred. Hidden information permits independent scoring; experiential complexity requires its own operational measure.

A multi-subject design separates information deposit from retrieval. One participant gives an entity a randomly generated word or number. Another isolated participant attempts to retrieve it through the encounter. Analysis compares the results with chance and available ordinary channels. Correlations require controls for shared expectations, cues, and information leakage.

The paper states its purpose directly:

“Our purpose here is not to claim that DMT entities represent external conscious agents, but to show that, given a formal theory in which consciousness is fundamental, such a possibility can be coherently formulated and experimentally investigated.”

Null results constrain the external-agent interpretations tested by those tasks. Reliable positive results require revision of assumptions about access, perception, and agency. The trace must be distinguished from dynamics generated wholly within the altered observer. The formal account supplies a mechanism for posing that distinction. The blinded task makes the distinction answer to an observation.

The Door Is Now an Instrument

Strassman’s clinical work made the recurring inhabited experience available as a research question. Gallimore’s engineering proposal addressed the brevity that obstructed its investigation. Extended infusion now holds an opening long enough for sustained observation under clinical conditions. Consciousness-first mathematics supplies explicit relations through which an independent source can be tested.

The encounter retains its depth while the test becomes more exact. A form appears; the participant addresses it; an independently specified task asks what the form can do. Returning reports can then carry information that the investigator scores outside the experience. Access acquires a measurable consequence without reducing the territory to its chemical doorway.

Repeated failures constrain the particular task and its assumptions about access and cooperation. Reliable controlled information transfer or independent continuity requires an account capable of admitting the result. The clinical door has become an instrument because inquiry can now remain at the threshold. Inquiry asks what answers through that opening and what consequences its answer carries beyond the session.

References

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Gallimore, Andrew R. Death by Astonishment: Confronting the Mystery of the World’s Strangest Drug. St. Martin’s Press, 2025.