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Factors affecting the development of spontaneous recurrence of methamphetamine psychosis
1Medical Care Section, Urawa Juvenile Classification Home, Ministry of Justice, Takasago, Japan.
Abstract:
The process triggering spontaneous recurrences of methamphetamine (MAP) psychosis (i.e. flashbacks) was studied in 41 flashbackers, along with 84 non-flashbackers with a history of MAP psychosis. Plasma monoamine metabolite levels were assayed in 25 of the 41 flashbackers, 16 of the 84 non-flashbackers, 9 subjects with persistent MAP psychosis and 28 control subjects. All flashbackers had experienced threatening events or frightening paranoid-hallucinatory states during previous MAP use. The dominant factor triggering flashbacks was a mild fear of other people. Plasma norepinephrine levels were elevated during flashbacks. The results suggest that a mild fear of other people may have elicited memories of MAP psychosis associated with threatening experiences through increased sensitivity to psychosocial stressors. As a result the flashbacks occurred, including an increase in peripheral noradrenergic activity.
Insights
Fear triggers methamphetamine (MAP) psychosis flashbacks by activating memories of past trauma. This heightened sensitivity to social stress, particularly fear of others, leads to recurrent psychosis episodes.
Area of Science:
- Neuroscience
- Psychiatry
- Pharmacology
Background:
- Methamphetamine (MAP) psychosis can lead to spontaneous recurrences known as flashbacks.
- Understanding the triggers for these flashbacks is crucial for developing effective interventions.
- Previous MAP use involving threatening experiences may predispose individuals to flashbacks.
Purpose of the Study:
- To investigate the triggering factors of spontaneous methamphetamine (MAP) psychosis recurrences (flashbacks).
- To examine the relationship between psychosocial stressors, fear, and flashback occurrence.
- To assess neurobiological correlates, specifically plasma monoamine metabolite levels, during flashbacks.
Main Methods:
- Studied 41 individuals experiencing MAP psychosis flashbacks and 84 non-flashbackers with a history of MAP psychosis.
- Assayed plasma monoamine metabolite levels in flashbackers, non-flashbackers, persistent psychosis subjects, and controls.
- Collected data on past experiences during MAP use and current triggering factors.
Main Results:
- A mild fear of other people was identified as the dominant trigger for flashbacks.
- Flashbackers reported experiencing threatening events or paranoid-hallucinatory states during previous MAP use.
- Elevated plasma norepinephrine levels were observed during flashback episodes.
Conclusions:
- A mild fear of others may trigger MAP psychosis flashbacks by evoking memories of past threatening experiences.
- Increased sensitivity to psychosocial stressors, particularly fear, plays a significant role in flashback recurrence.
- Flashbacks are associated with increased peripheral noradrenergic activity.