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This book, which covers Visions and hallucinations, explains what causes them and summarises how many hallucinations have been caused by each event or activity. It also provides specific help with questions people have asked us, such as ‘Is my medication giving me hallucinations?’.

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Observations placeholder

Prazosin and Minipress



Type of Spiritual Experience


Number of hallucinations: 7


A description of the experience

Prazosin, trade names Minipress, Vasoflex, Pressin and Hypovase, is  used to treat high blood pressure and anxiety, PTSD, and panic disorder. It is an alpha-adrenergic blocker that is specific for the alpha-1 receptors. These receptors are found on vascular smooth muscle, where they are responsible for the vasoconstrictive action of norepinephrine. They are also found throughout the central nervous system. As of 2013, prazosin is off-patent in the US, and the FDA has approved at least one generic manufacturer.

In addition to its alpha-blocking activity, prazosin is an antagonist of the MT3 receptor (which is not present in humans), with selectivity for this receptor over the MT1 and MT2 receptors.

Quote "Prazosin is also used in treating urinary hesitancy associated with prostatic hyperplasia, blocking alpha-1 receptors, which control constriction of both the prostate and urethra.....This medication has been used to treat severe nightmares in children and people with PTSD symptoms. .... It is being considered as a pharmacologic treatment for alcohol dependence after a 2009 pilot trial was completedThe drug is also recommended for severe stings from Indian Red Scorpion Hottentotta tamulus in Indian Subcontinent"


On Aug, 23, 2015: 302 people reported to have side effects when taking Prazosin hydrochloride. Among them, 3 people (0.99%) have Hallucination.

On Dec, 14, 20161,423 people reported to have side effects when taking Minipress.  Among them, 4 people (0.28%) have Hallucination


The source of the experience


Concepts, symbols and science items



Science Items

Activities and commonsteps