
Dennis Jon McKenna (born December 17, 1950) is an American ethnopharmacologist, research pharmacognosist, lecturer and author. He is the brother of well-known psychedelics proponent Terence McKenna and is a founding board member and the director of ethnopharmacology at the Heffter Research Institute, a non-profit organization concerned with the investigation of the potential therapeutic uses of psychedelic medicines.
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DMT: The Spirit Molecule
2010 · as Self - Ethnopharmacologist

2012: Time for Change
2010 · as Self

Manifesting the Mind: Footprints of the Shaman
2009 · as Self

Vine of the Soul: Encounters with Ayahuasca
2010 · as Himself

Neurons to Nirvana
2013 · as Self

Dosed 2: The Trip of a Lifetime
2022

Psyched Out
2018 · as Himself