Changa is quite possibly one of the most amazing innovations in the technology of the sacred in our lifetime. The smoking blend is a combination of banisteriopsis caapi leaves (commonly known as the ayahuasca vine) and a natural extract of DMT.

The qualities of the tea are much different than the qualities of the Changa smoking blend, as is drinking or sublingual administration of harmala alkaloids prior to smoking DMT. The tea is drunk and enzymes begin to be inhibited in the stomach, then the effect spreads throughout the body. Changa -- who's route of administration is smoking -- works very differently. The pyrolyzed smoking blend is inhaled, adsorbing into the lungs and going directly to the brain. In the brain the alkaliods inhibit enzymes directly, adding the unique effects of harmala alkaliods to the synergistic effects of the tryptamine harmala pharmacological relationship. The effects are faster, clearer headed, and more centering according to Changaleros (those who practice the way of smoke), with less to no nausea unless one is working with it to physically purge. The purge from Changa is more or less a matter of personal intention than physical reaction.

https://www.dmt-nexus.com/forum/default ... sts&t=3539
The effects of Changa are considered by many to be more grounded than just DMT freebase smoked on its own. The effects have been reported as being similar to a short Ayahuasca trip. The duration of effects is slightly longer than that of freebase DMT, with reports of trips lasting up to 12 minutes. There have also been reports of Changa being used in conjunction with Ayahuasca to intensify and then later revisit the experience.
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When infused with particular herbs DMT evolves into an almost completely different experience. Electrically charged depth, colour and feeling ooze through you like a hot knife through butter, the herbs bring more into the experience than you could imagine possible. It is so easy to breakthrough, so simple to use and simply so amazing! Overall, any person who considers themselves a DMT enthusiast has to attempt this method of smoking at least once; in all honesty though it's the only way to fly.

Herbs:

Pau D'Arco: Rich and exuberant meadows of pleasure
Blue/White/Pink Lotus: A distinct pleasurable and bright character
Calea Zacatechichi: The dream herb allows for a perfect synergy
Passion Flower: MAOI which potentiates and lengthens the experience
Caapi: Adds a spirit quality and potentiates and lengthens the experience
Damiana: Unique vibrance and taste
Brugmansia Flowers: Distinct other wordly character
Silene Capensis: African dream herb
Peppermint: Adds fresh soothing qualities
Mullein: Respiratory healing and soothing qualities
Heimia Salicifolia: Increases auditory hallucinations
Justicia Pectoralis: Smoother taste and a nice smell
Salvia Divinorum: Acts as an opener and enabler
Chaliponga: Adds a spirit quality and more magic
Mugwort: Dream synergy and mystical powers
Pedicularis Densiflora: Psychoactive sedating effects
Sculcap: Strengthens, calms and sedates nervous system
Wild Letus: Strengthens, calms and sedates nervous system
Lions Tail: Euphoric smoking herb

How much MAOI could be contained in a few puffs of a changa joint? While the leaves of Banisteriopsis caapi generally have a higher concentration of harmala alkaloids than the vine, they nevertheless may only contain 0.28-0.7%, or about 3 to 7 mg of MAOI alkaloids per gram of dried leaf.4 Using one recipe's suggested 50% B. caapi leaves plus 50% DMT (by weight), this adds up to only 1.5 to 3.5 mg of MAOI alkaloids in a one-gram joint-and changa is frequently diluted further with other herbs that don't contain MAOI chemicals.

Few people smoke a gram of material alone. If a changa joint is split between three or four people, then each person is getting, at most, one milligram of mixed harmala alkaloids. Justin Case ended his description of this smoking blend with the statement: "The degree to which [Banisteriopsis caapi leaves] can prolong the effects of DMT must be experienced to be believed." Could such a minuscule amount of harmala alkaloids really cause so much potentiation?

I asked Dennis McKenna of the Heffter Research Institute if he thought the trivial amount of harmala alkaloids likely to be present in most changa could possibly inhibit enough MAO to influence the DMT effects, and he replied:

I am not too surprised that it works; because although the amounts of beta-carbolines being absorbed may be small, they are directly absorbed into the brain, and given their potency [...], there is probably enough to transiently inhibit MAO in the brain, temporarily partially inhibiting metabolism of the tryptamines.5