People who used psychedelics during a two-month period reported a greater increase in days of mindfulness meditation per week than those who did not. Among psychedelic users, experiencing personal insight during the most intense psychedelic session was linked to larger increases in both mindfulness and loving-kindness or compassion meditation practice. Conversely, more frequent loving-kindness or compassion meditation at the start of the study was associated with less severe feelings of death or dying during the subsequent psychedelic experience. These findings suggest a bidirectional relationship: psychedelics may boost meditation engagement, while meditation may reduce challenging psychedelic experiences.
A longitudinal study with nearly 10,000 US and UK adults found that people who used psychedelics during a two-month period reported greater increases in unusual visual experiences compared to those who did not. The effect was strongest among first-time users. These visual experiences occurred after the acute drug effects had worn off. The findings support earlier case reports and cross-sectional studies suggesting that naturalistic psychedelic use may be linked to persistent visual phenomena, though further longitudinal research is needed to clarify cause-and-effect relationships.