DMT

N,N-Dimethyltryptamine (DMT) is a naturally occurring tryptamine and one of the most-studied psychedelics in modern research neuroscience. It binds primarily to the 5-HT2A serotonin receptor, like LSD and psilocybin, but produces a radically different subjective experience: extremely fast onset (seconds when smoked), short total duration (15-30 minutes), and intense visual and conceptual content that many users describe as discontinuous with ordinary waking experience. The substance also appears endogenously in trace amounts in mammals — Strassman's New Mexico clinical trials in the 1990s drove much of the modern revival of DMT research, including the controversial "spirit molecule" framing.

There are three common ways to consume DMT, and they produce meaningfully different experiences. Smoked or vaporized DMT freebase produces an extremely intense, short experience peaking at 2-5 minutes. Oral DMT requires an MAOI to prevent gut breakdown — this is the ayahuasca preparation, with a much longer 4-6 hour duration and a heavy physical component including vomiting and diarrhoea ("the purge"). Changa, a smoking blend of plant material infused with DMT freebase and a small amount of MAOI plants, sits somewhere in between — gentler and slightly longer than pure smoked freebase.

Physically DMT is among the safer psychedelics. There is no documented LD50 at recreational doses, no known neurotoxicity, no documented cardiovascular harm at typical amounts. The real risks are interactional and psychological. Combination with MAOIs (whether pharmaceutical antidepressants or the harmala alkaloids in ayahuasca) creates serotonin-syndrome risk. SSRIs and SNRIs blunt the experience but stack serotonergic load. And the experiences themselves — particularly at "breakthrough" doses — can be psychologically destabilising for users in poor set/setting, with active mental health crises, or with histories of psychotic-spectrum disorders.

Harm reduction

• Test the freebase with Ehrlich reagent — pink-purple confirms a tryptamine. Marquis gives orange to red-brown. NBOMe (which can be fatal) gives no Ehrlich reaction, so the test genuinely distinguishes.
• Set and setting matter more for DMT than for most psychedelics. The come-up is sudden and the experience is dense. A comfortable position (lying down, supported), dim lighting, calm music and a trusted sober sitter dramatically reduce the chance of a difficult experience.
• Start with a "common" dose. 20-30 mg smoked for someone seeking a moderate experience; 10-15 mg for someone exploring. The 60 mg "I want to break through" doses are not first-session doses.
• Avoid MAOIs unless in a structured ayahuasca context. Pharmaceutical MAOIs (phenelzine, tranylcypromine) plus DMT carries serious serotonin-syndrome risk. Even moclobemide (a reversible MAOI used in some ayahuasca analogues) needs careful timing.
• Wash out SSRIs and SNRIs for at least 2-6 weeks before any ayahuasca or MAOI-extended DMT preparation. Pure smoked DMT can be combined with SSRIs but the experience is significantly blunted.
• Don't combine with lithium. Well-documented seizure risk with classical psychedelics.
• If a friend is having a hard time during a session: calm voice, dim light, music they know, reassure them that the experience is short. For smoked DMT it will be over in 15-20 minutes regardless. Do not give them benzos or alcohol without medical advice.
• Mental health context matters. DMT and other classical psychedelics can destabilise active psychotic-spectrum conditions and may not be appropriate for users with personal or strong family histories of schizophrenia or bipolar I disorder.