Cannabis-induced anxiety can last anywhere from 30 minutes to 6 hours, depending on several factors:

Duration Breakdown:

  • Onset: Anxiety often begins within 15–30 minutes of consumption, especially when using high-THC strains.
  • Peak effects: Symptoms usually peak around 30–60 minutes after use.
  • Fade-out period: For most users, anxiety symptoms wear off within 2–6 hours.
  • Lingering effects: In some individuals, especially those sensitive to THC or with pre-existing anxiety disorders, mild anxiety or mental fog may persist for 24 hours or more.

Why Does Cannabis Cause Anxiety?

Cannabis—particularly strains high in THC (tetrahydrocannabinol)—can overstimulate areas of the brain that regulate fear, stress, and emotion. This may lead to:

  • Racing thoughts
  • Increased heart rate
  • Paranoia
  • Panic attacks

Key Factors That Influence Duration:

  • THC potency
  • Dosage consumed
  • Delivery method (smoking, edibles, vapes)
  • Personal tolerance
  • Mental health history
  • Environment or setting

When to Seek Help

If your cannabis-induced anxiety:

  • Lasts longer than 24–48 hours
  • Leads to recurring panic attacks
  • Triggers persistent fear or paranoia

…it may signal an underlying anxiety disorder. In such cases, it’s recommended to speak with a licensed mental health professional.