Analyze pharmacological interactions between substances
Scientific education tool — not medical or clinical advice. In emergencies, contact emergency services immediately.
SSRI
Antidepressiva
Tramadol
Opioide
Selected high-signal pairs resolved through the same interaction index as the detail pages.
Class notes show recurring interaction patterns and link to example substances.
Serotonergic psychedelics alter perception, cognition, and body state mainly through 5-HT2A-linked mechanisms.
Key interaction concerns include MAOIs, lithium, stimulants, and other strongly serotonergic profiles.
Prefill checkerClass-based warnings are a safety floor, not a substitute for substance-specific review. Risk depends on dose, route, timing, tolerance, health status, and individual factors. This is informational and not medical advice.
The Synapedia Interaction Checker identifies known pharmacological interactions between psychoactive substances using curated, source-backed data. Each interaction entry includes the underlying mechanism conflict, a risk rating, and concrete harm-reduction guidance.
Explore substance relationships visually in the or compare two substances side by side in the .
Stimulants typically increase dopaminergic and noradrenergic activity and strain cardiovascular, sleep, and temperature regulation.
MAOIs, other stimulants, and strongly serotonergic substances are especially important interaction contexts.
Depressants reduce central nervous system activity through GABAergic, opioid, or related sedating mechanisms.
The core safety floor is additive sedation, including respiratory depression when multiple depressants overlap.
Prefill checkerDissociatives often act through NMDA antagonism and alter body perception, pain processing, and orientation.
Important combinations include depressants, stimulants, serotonergics, and substances with cardiovascular strain.
Prefill checkerOpioids act at opioid receptors and can cause analgesia, sedation, and respiratory depression.
Benzodiazepines, alcohol, GHB, and other depressants increase additive respiratory-depression risk.
Prefill checkerBenzodiazepines enhance GABA-A signaling and can be sedating, anxiolytic, muscle-relaxing, and anticonvulsant.
Opioids, alcohol, GHB, and other depressants are the central interaction group for additive respiratory depression.
Prefill checkerCannabinoids modulate the endocannabinoid system and can affect perception, anxiety, cardiovascular state, and sedation.
Relevant concerns include additive sedation, amplified psychoactive effects, and individual anxiety or cardiovascular responses.
Prefill checkerSSRIs increase serotonergic signaling by inhibiting serotonin reuptake.
MAOIs, MDMA, tramadol, DXM, and other serotonergic profiles are especially relevant.
Prefill checkerSNRIs increase serotonergic and noradrenergic signaling and can combine serotonin and cardiovascular concerns.
MAOIs, MDMA, tramadol, DXM, and other serotonergic substances are central interaction contexts.
Tricyclic antidepressants affect monoamine transporters and additional receptor systems, often with anticholinergic effects.
MAOIs, serotonergic substances, and other cardiovascularly stressful combinations are especially relevant.
MAOIs reduce monoamine breakdown and can strongly alter effects of many serotonergic or adrenergic substances.
Many combinations with MDMA, stimulants, SSRIs/SNRIs, tramadol, or DXM are high-risk or critical.
The Interaction Checker is based on curated data from pharmacological literature and PubMed publications. It is intended for scientific education only and does not replace medical advice. Not all interactions are covered — always consult healthcare professionals when in doubt.
