Blunted stress reactivity in chronic cannabis users

Area of Science:

• Neuroscience
• Psychology
• Pharmacology

Background:

• Chronic cannabis use is often linked to stress coping.
• Cannabis users typically exhibit reduced emotional arousal and stress responses.
• This study investigates the impact of acute stress on cannabis users versus non-users.

Purpose of the Study:

• To examine the effects of acute stress on subjective stress and salivary cortisol in chronic cannabis users compared to non-users.
• To determine if cannabis use alters physiological and psychological stress reactivity.
• To explore the relationship between cannabis use and stress response mechanisms.

Main Methods:

• Forty cannabis users and 42 non-users underwent the Maastricht Acute Stress Test (MAST) with or without a stress condition.
• The stress condition involved physiological (cold pressor) and psychosocial stressors.
• Subjective stress, salivary cortisol, cannabis cravings, and withdrawal symptoms were measured.

Main Results:

• Non-users in the stress condition showed significantly higher subjective stress and cortisol levels than those in the no-stress condition.
• Cannabis users exhibited blunted stress reactivity, with no significant increase in cortisol and a smaller rise in subjective stress.
• The stress manipulation did not affect cannabis users' cravings or withdrawal symptoms.

Conclusions:

• Chronic cannabis use is associated with blunted physiological and subjective stress reactivity.
• Further research is required to understand if this blunted response confers resilience or vulnerability to stress-related disorders.
• Investigating the underlying mechanisms of this altered stress response in cannabis users is crucial.