4-AcO-DET produces 59 documented subjective effects across 5 categories.
Full 4-AcO-DET profileThe first sign arrives as a gentle fizzing sensation behind the eyes, spreading outward through the temples and down into the jaw within twenty to thirty minutes of ingestion. A warmth settles into the chest — not the sharp heat of stimulation, but something more like the slow radiance of afternoon sunlight through curtains. The stomach may turn slightly, a brief knot of nausea that loosens as the body adjusts. Colors begin to shift in subtle ways: reds deepen toward burgundy, greens acquire a luminous, almost backlit quality, and there is a strange new depth to shadows, as though darkness itself has become a color.
As the come-up builds over the next thirty to sixty minutes, the visual field opens dramatically. Surfaces ripple with intricate patterning — not the rigid geometric lattices of lysergamides, but something more organic and flowing, like watching oil spread across water or light refracted through antique glass. Closed-eye visuals bloom in rich, saturated palettes: spiraling tunnels of amber and teal, crystalline structures that fold and unfold with each breath. There is a dreamlike quality to thought — ideas arrive not in linear sequences but in clusters, each one trailing threads of association and memory. Music becomes deeply absorbing, each note seeming to carry emotional information that bypasses language entirely.
At the peak, which settles in around ninety minutes and persists for two to three hours, 4-AcO-DET reveals its distinctive character: a headspace that is simultaneously contemplative and oddly lighthearted. Unlike the heavy introspective gravity of psilocin or the analytical clarity of lysergamides, this compound encourages a kind of playful philosophical wandering. Thoughts feel important but not urgent, profound but not burdensome. The ego softens without dissolving entirely, leaving a comfortable sense of perspective. The body feels pleasantly heavy and warm, as though wrapped in something soft.
The descent is gradual and unhurried, unfolding over two to three hours. The vivid patterning slowly recedes to a gentle shimmer, and the dreamlike ideation gives way to a calm lucidity. Physical tiredness sets in gently, accompanied by a lingering warmth in the limbs and a sense of having traveled somewhere meaningful and returned safely. The afterglow often carries a quiet satisfaction, a renewed appreciation for simple things — the texture of a blanket, the complexity of a friend's face, the way evening light falls across a room.
Abnormal heartbeat (arrhythmia) is any deviation from the heart's normal rhythm — including beats that are too fast (tachycardia), too slow (bradycardia), or irregularly spaced — and represents one of the more medically significant cardiovascular effects of psychoactive substances.
Appetite suppressionA distinct decrease in hunger and desire to eat, ranging from reduced interest in food to complete disinterest or even physical revulsion at the thought of eating. This effect can persist for many hours beyond the primary experience.
DehydrationA state of insufficient bodily hydration manifesting as persistent thirst, dry mouth, and physical discomfort, often caused by increased sweating, urination, or simply forgetting to drink water during substance use.
Difficulty urinatingDifficulty urinating, also known as urinary retention, is the experience of being unable to easily pass urine despite a full bladder, commonly caused by stimulant, opioid, and anticholinergic substances that affect bladder muscle control.
DizzinessA sensation of spinning, swaying, or lightheadedness that impairs balance and spatial orientation, often accompanied by nausea and difficulty standing or walking steadily.
Excessive yawningInvoluntary, repeated yawning that occurs far more frequently than normal and often without the usual association with tiredness or boredom. The yawns may be deep and extended, sometimes occurring in rapid succession, and can be accompanied by watery eyes and a brief sense of stretching release throughout the face and jaw.
Frequent urinationIncreased urinary frequency beyond normal patterns, caused by diuretic effects or bladder irritation from substances like alcohol, caffeine, and ketamine.
HeadacheA painful sensation of pressure, throbbing, or aching in the head that can range from a dull background discomfort to a debilitating pounding that dominates awareness. Substance-induced headaches may occur during the acute effects, during the comedown, or as a rebound symptom hours to days after use.
Increased bodily temperatureIncreased bodily temperature (hyperthermia) is an elevation of core body temperature above the normal 37C (98.6F) baseline, caused by substances that increase metabolic rate, impair thermoregulation, or promote sustained physical activity, and representing one of the most dangerous physical effects when severe.
NauseaAn uncomfortable sensation of queasiness and stomach discomfort that may or may not lead to vomiting, often occurring during the onset phase of many substances.
Physical euphoriaAn intensely pleasurable bodily sensation that can manifest as waves of warmth, tingling electricity, or a full-body orgasmic glow radiating outward from the core. This effect is often described as one of the most rewarding physical sensations available through psychoactive substances and is a primary driver of the recreational appeal of many substance classes.
Pupil dilationA visible enlargement of the pupil diameter (mydriasis) that can range from subtle widening to dramatic saucer-like expansion where the dark pupil dominates the iris. This effect is one of the most recognizable signs of psychedelic and stimulant intoxication and directly contributes to light sensitivity, enhanced color perception, and the characteristic "wide-eyed" appearance.
Runny noseExcessive nasal discharge commonly occurring during opioid withdrawal or from nasal irritation caused by insufflated substances.
SedationA state of deep physical and mental calming that manifests as a progressive desire to remain still, lie down, and eventually drift toward sleep. Sedation ranges from a gentle drowsy relaxation to a heavy, irresistible pull into unconsciousness where maintaining wakefulness becomes a losing battle against the body's insistence on shutdown.
SeizureUncontrolled brain electrical activity causing convulsions and loss of consciousness -- a life-threatening medical emergency requiring immediate help.
Serotonin syndromeSerotonin syndrome is a potentially fatal medical emergency caused by excessive serotonergic activity in the central and peripheral nervous systems, typically resulting from combining multiple serotonin-elevating substances, and manifesting as a dangerous triad of neuromuscular hyperactivity, autonomic dysfunction, and altered mental status.
StimulationA state of heightened physical and mental energy characterized by increased wakefulness, elevated motivation, and a subjective sense of vigor that pervades both body and mind. Users often report feeling electrically alive, with a buzzing readiness to move, talk, and engage that can range from a pleasant caffeine-like lift to an overwhelming, jittery compulsion to act.
Stomach bloatingStomach bloating is the uncomfortable distension of the abdomen resulting from gas accumulation, fluid retention, or gastrointestinal irritation caused by the ingestion of certain psychoactive substances or their inactive fillers and binders.
Stomach crampStomach cramps are sharp, intermittent pains in the abdominal region that can occur when psychoactive substances irritate the gastrointestinal lining or alter the normal patterns of smooth muscle contraction in the digestive tract.
Teeth grindingAn involuntary clenching and rhythmic grinding of the jaw muscles, known clinically as bruxism, that produces a compulsive need to clench, chew, or gnash the teeth together. This effect can range from a subtle tightness in the jaw to forceful, repetitive grinding that can cause significant dental damage and jaw pain during and after the experience.
Watery eyesExcessive tear production causing overflow tearing and blurred vision, commonly occurring during opioid withdrawal and with dissociatives.
A visual phenomenon in which a faint, ghostly imprint of a previously viewed image persists in the visual field after the original stimulus has been removed or one has looked away. These lingering visual echoes are significantly more persistent, vivid, and detailed than normal physiological afterimages, often retaining color and form for several seconds or longer and overlaying themselves onto whatever one currently views.
Brightness alterationPerceived increase or decrease in environmental brightness beyond actual illumination levels, common with stimulants and psychedelics (brightening) or sedatives (darkening).
Colour enhancementAn intensification of the brightness, vividness, and saturation of colors in the external environment, making the world appear dramatically more colorful. Reds seem redder, greens seem greener, and all hues appear richer and more distinct than during ordinary perception.
Colour shiftingThe visual experience of colors on objects and surfaces cycling through continuous, fluid transformations, shifting from one hue to another in smooth, seamless loops. A green surface might flow through blue, purple, red, and back to green in a mesmerizing animated sequence.
Depth perception distortionsAlterations in how the distance of objects within the visual field is perceived, causing layers of scenery to appear exaggerated, rearranged, flattened, or warped in spatial depth.
DiffractionThe experience of seeing rainbow-like spectrums of color and prismatic halos embedded within bright light sources and reflective surfaces, caused by pupil dilation altering how light enters the eye.
DriftingThe visual experience of perceiving stationary objects, textures, and surfaces as appearing to flow, breathe, melt, or shift in position. Drifting is one of the most fundamental and commonly reported visual distortions under the influence of psychedelic substances, serving as the perceptual foundation upon which many other visual effects are built. It manifests as a fluid, organic sense of motion embedded in otherwise static visual fields.
GeometryThe experience of perceiving complex, ever-shifting geometric patterns superimposed over the visual field or visible behind closed eyelids. Geometry is widely considered the hallmark visual effect of psychedelic substances, ranging from simple lattice patterns and honeycombs at low doses to infinitely complex, self-transforming fractal structures at high doses that can feel profoundly meaningful and awe-inspiring.
Internal hallucinationVivid, detailed visual experiences perceived within an imagined mental landscape that can only be seen with closed eyes, ranging from fleeting imagery and abstract scenes to fully immersive, dream-like environments with autonomous narratives and entities.
Pattern recognition enhancementAn increased ability and tendency to perceive meaningful patterns, faces, and images within ambiguous or random visual stimuli such as textures, clouds, and surfaces.
Perspective distortionsDistortion of perceived depth, distance, and size of real objects, making things appear closer, further, larger, or smaller than they actually are.
Perspective hallucinationA hallucinatory phenomenon in which the observer's visual perspective shifts from the normal first-person viewpoint to alternative vantage points — including third-person (seeing oneself from outside), bird's-eye, or omniscient perspectives — during both internal and external hallucinations.
Settings, sceneries, and landscapesThe perceived environment in which hallucinatory experiences take place, ranging from recognizable locations drawn from memory to entirely novel alien landscapes, ancient civilizations, cosmic vistas, and impossible architectural spaces.
Symmetrical texture repetitionTextures appear to mirror and tessellate across surfaces in intricate, self-similar symmetrical patterns that maintain detail at every scale. Most prominent in peripheral vision on rough surfaces.
TracersMoving objects leave visible trails of varying length and opacity behind them, similar to long-exposure photography. Trails may match the object color or appear in other hues.
TransformationsObjects and scenery undergo perceived visual metamorphosis, smoothly shapeshifting into other recognizable forms over seconds. Patterns morph into faces, animals, and imagery.
Visual acuity enhancementVision becomes sharper and more defined than normal, as though a slightly blurry lens has been brought into perfect focus. Edges appear crisp and fine details become vivid.
A perceived improvement in one's ability to logically deconstruct concepts, recognize patterns, and reach novel conclusions, often accompanied by deep states of contemplation and an abundance of insightful ideas.
AnxietyIntense feelings of apprehension, worry, and dread that can range from a subtle background unease to overwhelming panic attacks with a sense of impending doom, often amplified by the substance's intensification of one's existing mental state.
Autonomous voice communicationAutonomous voice communication is the experience of hearing and engaging in conversation with one or more internal voices that feel genuinely independent from one's own thoughts — capable of expressing novel ideas, holding opinions the person does not share, and carrying on complex dialogue that feels unscripted and spontaneous.
Conceptual thinkingA shift in the nature of thought from verbal, linear sentence structures to intuitive, non-linguistic concepts that are felt and understood rather than spoken by an internal narrator.
Deja vuIntense, often prolonged sensation of having already experienced the current moment, common with psychedelics and dissociatives.
DelusionA delusion is a fixed, false belief that is held with unshakeable certainty and is impervious to contradicting evidence or rational argument — often involving grandiose, persecutory, or bizarre themes that are clearly at odds with observable reality.
Enhancement and suppression cyclesEnhancement and suppression cycles is a distinctive cognitive effect in which the mind alternates between periods of noticeably sharpened mental function — clarity, analytical power, creative flow — and periods of foggy, suppressed cognition, with these states swapping at irregular intervals throughout the experience.
Immersion enhancementA heightened capacity to become fully absorbed and engrossed in external media such as music, films, video games, and art, with an amplified suspension of disbelief and a deepened emotional connection to the content being experienced.
IntrospectionAn enhanced state of self-reflective awareness in which one feels drawn to examine their own thoughts, emotions, behaviors, and life patterns with unusual depth, clarity, and emotional honesty, often yielding insights that feel therapeutically significant.
Memory suppressionA dose-dependent inhibition of one's ability to access and utilize short-term and long-term memory, ranging from mild forgetfulness to a profound inability to recall personal identity, biographical information, or the context of the current experience.
Novelty enhancementA feeling of increased fascination, awe, and childlike wonder attributed to everyday concepts, objects, and experiences, as if perceiving the world for the first time.
Personal bias suppressionA decrease in the personal, cultural, and cognitive biases through which one normally filters their perception, enabling more objective self-examination and worldview analysis.
PsychosisPsychosis is a serious psychiatric state involving a fundamental break from consensus reality — characterized by firmly held false beliefs (delusions), perception of things that are not there (hallucinations), disorganized thought and speech, and a loss of the ability to distinguish internal mental events from external reality.
Thought connectivityA state in which disparate thoughts, concepts, and ideas become fluidly and spontaneously interconnected, revealing patterns and relationships that are normally overlooked. The mind weaves together seemingly unrelated subjects into a unified web of associations, often producing novel insights or a profound sense of conceptual coherence.
Thought loopsBecoming trapped in a repeating cycle of thoughts, actions, and emotions that loops every few seconds to minutes. Short-term memory lapses cause the sequence to restart.
Time distortionSubjective perception of time becomes dramatically altered — minutes may feel like hours, or hours pass in moments. Can manifest as either dilation or compression.
WakefulnessAn increased ability to stay awake and alert without the desire to sleep. Distinct from stimulation in that it does not elevate energy above a naturally rested baseline.
A profound dissolution of the sense of self in which personal identity, memories, and the boundary between self and world completely vanish, leaving only pure undifferentiated awareness.
Perception of predeterminismPerception of predeterminism is the powerful subjective experience of feeling — not merely thinking, but viscerally knowing — that every event, decision, and experience is the inevitable result of prior causes stretching back to the beginning of time, making free will feel like an elaborate illusion.
Unity and interconnectednessA profound sense that identity extends beyond the self to encompass other people, nature, or all of existence. Boundaries between self and other dissolve into felt oneness.
4-AcO-DET can produce 21 physical effects including appetite suppression, excessive yawning, teeth grinding, pupil dilation, and 17 more.
Yes. 4-AcO-DET can produce 17 visual effects including settings, sceneries, and landscapes, pattern recognition enhancement, symmetrical texture repetition, depth perception distortions, and 13 more.
4-AcO-DET produces 17 cognitive effects including personal bias suppression, immersion enhancement, thought connectivity, analysis enhancement, and 13 more.