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I believe the combination of drugs you took contributed to your near death experience. All three medications are sedatives. It is especially common for Nardil to interact with other sedative medications and induce somnolence and suppress breathing. This combination is particularly dangerous if your body is not used to the effects of sedatives.
Respiratory suppression is common when people mix alcohol with pain medicines like vicodin, or when they take more than 2 sedative medications together. Your reaction to the drugs was very strong. It is important for you to let your doctors know how sensitive you are to sedative medications.