Ayahuasca, also known as 'Hausca' or 'hosca,' potent hallucinogenic brew used in Shamanic healing ceremonies, and as a sacrament of the Santo Daime and Unaio do Vegetal Churches, among others. Ayahuasca's main active ingredient is DMT, a drug valued for its use in promoting introspective psychological exploration.

Related Resources:

• Shamanism
  Shamanic religion on About.com.