Hello! I'm currently on 200mg of codeine, and I'm wondering if there could be a dangerous interaction between the codeine and ayahuasca, and if it is, how long should I wait before drinking the ayahuasca to prevent a dangerous interaction?

The phenylpiperidine series opioids, pethidine (meperidine), tramadol, methadone and dextromethorphan and propoxyphene, appear to be weak serotonin re-uptake inhibitors and have all been involved in serotonin toxicity reactions with MAOIs (including some fatalities). Morphine, codeine, oxycodone and buprenorphine are known not to be SRIs, and do not precipitate serotonin toxicity with MAOIs