Fireside’s Data on Hallucinogen Persisting Perception Disorder
HPPD: Understanding So-called "Acid Flashbacks"
Hallucinogen Persisting Perception Disorder (HPPD) is a rare and often distressing condition characterized by lingering visual disturbances after the use of psychedelic drugs. Often referred to as "acid flashbacks," HPPD involves persistent perceptual symptoms such as visual snow, geometric hallucinations, and distortions in depth perception, even long after the drug has left the system. While psychedelics like lysergic acid diethylamide (LSD) and psilocybin have been hailed for their potential therapeutic benefits, HPPD represents one of the more concerning long-term effects, leaving individuals with symptoms that disrupt their daily lives.
From Our Support Line: How Common is HPPD?
At Fireside Project, around 1% of our approximately 25,000 callers report dealing with symptoms consistent with HPPD. While this percentage may seem small, the impact of HPPD can be profound. Many callers describe it as one of the most frightening and dysregulating experiences following psychedelic use. Despite its severity, HPPD remains widely misunderstood, with few resources available for those affected. One organization making a difference is The Perception Restoration Foundation, which offers extensive support and guidance for those suffering from HPPD. Their comprehensive guide can be found here.
Anecdotally, our conversations with callers tell us that HPPD is the antithesis of what the "psychedelic hype" builds up, where psychedelics are supposed or assumed to grant a mystical experience that cures all mental health conditions. Thus, sufferers now seems to struggle not just with the HPPD itself, but also the disappointment of not having or sharing in the rewarding experiences of their peers, and wondering what is 'wrong' with them.
How Do You Tell If You Have HPPD?
HPPD presents with a variety of perceptual symptoms that can persist for weeks, months, or even years after psychedelic use. Common symptoms include:
Visual Snow: A static-like visual disturbance that overlays the entire field of vision.
Geometric Hallucinations: Seeing intricate patterns, halos, or trails around objects.
False Perceptions: Seeing flashes of light or distortions in color, size and shape.
Hypnopompic Hallucinations: Vivid visual experiences occurring while waking up.
Depth Perception Issues: Difficulty gauging distances, leading to dizziness and disorientation.
For many individuals, these symptoms are not just an inconvenience, but serious side-effects that can interfere with work, social interactions, and overall quality of life, potentially causing real harm. HPPD can also co-occur with anxiety disorders, depressive symptoms, and post-traumatic stress disorder (PTSD), further complicating mental health outcomes.
How Long Does HPPD Last?
The duration of HPPD varies widely. Some individuals experience symptoms for a few weeks, while others struggle for years. Factors influencing recovery include:
Frequency and dosage of psychedelic drug use.
Personal mental health history, including prior psychiatric disorders.
Presence of substance use disorders such as alcohol use disorder or cannabis-induced persisting perception disorder.
Level of stress and anxiety, which can exacerbate symptoms.
Research into the long-term effects of HPPD is still limited, but some individuals report marked improvement with time, lifestyle changes, and proper treatment.
Is HPPD Curable?
There is no universal cure for HPPD, but treatment options exist that may alleviate symptoms:
Clonazepam treatment: Some evidence suggests that benzodiazepines like clonazepam can provide relief from visual disturbances and anxiety symptoms.
Lamotrigine trials: Limited clinical trials indicate potential benefits of anticonvulsants in reducing perceptual symptoms.
SSRI and atypical antipsychotic treatments: Though controversial, some individuals find relief with selective serotonin reuptake inhibitors and atypical antipsychotics like risperidone.
Brain stimulation treatments: Emerging research into brain stimulation may offer future treatment possibilities.
Mindfulness and grounding techniques: Non-medical interventions such as meditation, sensory regulation, and structured routines can help manage symptoms.
The Emotional Toll of HPPD
HPPD not only disrupts visual perception but can also deeply affect an individual’s emotional well-being. Many of our callers describe feelings of frustration, hopelessness, and isolation. One of the most challenging aspects of HPPD is that it contradicts the mainstream psychedelic narrative, which often highlights mystical experiences and healing potential. Individuals suffering from HPPD may feel alienated, wondering why their experience was negative while others describe profound, life-changing insights.
At Fireside Project, we recognize that every psychedelic experience is unique, and we provide support for individuals navigating the difficult aftermath of challenging trips. Whether someone is dealing with flashback phenomena, persistent sensory disturbances, or anxiety linked to negative experiences with psychedelics, we offer a compassionate, judgment-free space for integration and healing.
Seeking Support for HPPD
For those struggling with HPPD, resources are limited but growing. We encourage individuals to explore The Perception Restoration Foundation for more specialized guidance. Additionally, if you need real-time support or simply someone to talk to, our Fireside Project Psychedelic Support Line is here to help.
If you or someone you know is struggling with HPPD, reach out to us for support. Psychedelic experiences can be unpredictable, but you don’t have to navigate them alone.
Fireside Project does not condone the use of illegal substances including psychedelics. If you choose to partake we encourage safety and awareness.
