There are New Age centers that revolve around the taking of the drug Ayahuasca which the moronic New Agers always promote as "harmless" along with all the other psychedelic drugs they promote but:
Ayahuasca contains MAOIs which means certain drugs and foods must not be used with it as that can cause death. The drugs-forum MAOI wiki contains a list of drugs and foods to avoid and can be found here.
These are the dangers common to all psychedelic drugs:
Accidental injury. When on a psychedelic drug, it is easier to accidentally injure yourself. Also because of the disorientating and potentially delusion inspiring nature of the experience, you could be lead to inflict harm on others or yourself. People have fallen off rooftops, run into traffic, attempted to throw people off rooftops as 'sacrifices', drowned, and so on. The best way of protecting against this is to have a friend with you who is sober to look after you and handle any negative situation that might arise.
Bad trips. A bad trip is a negative psychedelic experience. It can range from a mildly negative feeling of anxiety/discomfort, to full-blown psychosis. Bad trips usually ruin a psychedelic experience for the tripper and everyone else. Most bad trips are manageable, just very uncomfortable and difficult. Some are extreme and unmanageable though. It's not uncommon for a bad trip to result in lingering psychological issues. Usually just a few days of negative emotions and anxiety. Sometimes, however, a week or so of serious anxiety, destabilized mental state and impaired functioning is possible. On very rare occasions, a month or two of severely diminished functioning, traumatized mental state, depression & crippling anxiety can occur. More information on bad trips can be found here. The best way of avoiding a bad trip is having the correct set and setting.
Permanent psychosis. Psychedelics are believed by researchers not to cause permanent psychosis, however they could trigger a latent mental illness in someone who was already predisposed to it, or make existing mental illnesses worse. If there is a history of mental illness in your family, you are more likely to be predisposed. Everyone is at some risk, however.
PTSD, anxiety disorder, depression & depersonalization. There are anecdotal reports of the trauma inflicted by some bad trips leading to depression and anxiety which while usually temporary, could potentially develop into lasting disorders. While no different to the potential of any traumatic event to cause lasting disorders, nonetheless this is a danger of psychedelic drug use.
A lot of the above is also known to apply to Marijuana as well which the enemy and these New Agers always promote.
The New Agers and others go to these retreat drug centers such as Rythmia in which they engage in sleep deprivation for almost a week straight, eat almost nothing and engage in taking Ayahuasca psychedelic drugs constantly while in engaging in group actives that create mental states of dissociation. Then after all this they get open indoctrination into Cultural Marxist classes as a form of programming. This is the standard practice of MLK ULTRA they used psychedelic's, sleep depravation and other disorientating tactics to break apart the mind of the victim and then program them. What is going on at these retreat centers is a form of mind control the enemy is using standard tactics of mind control to indoctrinate New Age types into straight Marxism under the mask of spirituality. This is why the enemy promotes the drugs as well. Many of the people who take Ayahuasca always report having interactions with Reptilians and Greys who attempt to manipulate them as well. The Reptilians claimed to be the creators of the universe and God to some of these people they showed up to while on Ayahuasca. The drugs open people psychically to the enemy.