Amanita muscaria, commonly known as fly agaric or fly amanita, is a mushroom renowned for its distinctive appearance and psychoactive properties attributed to its compounds, ibotenic acid, and muscimol. Contemporary interest in Amanita muscaria has surged, driven by anecdotal reports of perceived psychological and medicinal benefits. However, no clinical studies exist thus far. This study employs thematic analysis of discussions from the “r/AmanitaMuscaria” subreddit on Reddit to explore users’ reasons for its consumption and the positive and negative experiences associated with this mushroom. A total of 998 principal posts and their associated 9,542 comments were analyzed, revealing thematic trends in adverse effects, perceived positive outcomes, reasons for use, modes of consumption, and thought perceptions. Findings highlight that users experienced more positive than adverse effects, and adverse effects experienced were minimal and primarily self-limiting. These findings may be particularly salient in clinical settings, as medical providers might find it challenging to uncover Amanita muscaria use among their patients unless presented with severe adverse effects. Future research is recommended to investigate Amanita muscaria’s pharmacology further to inform patients and medical providers of safe practices. Finally, an innovative methodological strategy is warranted to examine Reddit posts in-depth to understand users’ perceptions and attitudes.