Combining certain substances with others can lead to dangerously high serotonin levels, potentially causing serotonin syndrome, which requires immediate medical attention and can be fatal if untreated.
MAOIs: Including substances like banisteriopsis caapi, Syrian rue, phenelzine, selegiline, and moclobemide.
Serotonin Releasers: Such as MDMA, 4-FA, methamphetamine, methylone, and αMT.
SSRIs: Including medications like citalopram and sertraline.
SNRIs: Such as tramadol and venlafaxine.
5-HTP: A precursor to serotonin.
Extreme caution should be exercised when combining these substances to avoid the risk of serotonin syndrome.