This plant was called Sinicuichi (or Sun Opener) by the Aztecs and is still used by Mexican shamans as a trance divination catalyst. They regard it as a sacred herb, enabling vivid recall of past distant events. Some users even report the remembrance of pre-birth events! Often causes a yellowing of the vision and altered acoustic perception.
May induce feelings of calmness and unity. Slows heartbeat, relaxes muscles, reduces blood pressure.
The most common traditional preparation method was as a fermented tea. The wilted fresh leaves were added to a cup of cold water, or the dried leaves steeped in a cup of hot water, and then allowed to ferment in the sun for 24hrs. After that, they are strained and the juices squeezed out to produce a visionary tea. According to entheology.com, about 10g is good "as a starting point to initiate the shaman in the spirit world".
Another common (perhaps more recent) way to injest Sun Opener is a smoke.
Another traditional use is as a thick medicinal salve that is used to cover open wounds, stop bleeding and promote healing. This salve is prepared in the same way as the fermented tea, except the tea is left to evaporate into a thick paste. The juice of the fresh leaves was also applied to the skin to repel mosquitos and other insects.
The traditional method of preparation is to let it ferment in water in the sun for 24 hours before ingestion. In Aztec legend it is said that during the solar fermentation process of preparation, the knowledge of the sun is embedded into the potion, creating the Elixir of the Sun. Very interesting!
No hangover or serious side effects are known; except that with over-indulgence you may notice a golden yellow tinge to your vision the following day. Constant to excessive use may eventually hamper short-term memory.