Beta blockers bind to, and block beta adrenergic receptors in the body. They inhibit the affects of epinephrine and norepinephrine on the sympathetic nervous system. Therefore, inhibiting the fight/flight/freeze response.

Propranolol is the most commonly used beta blocker.

Beta blockers have been used to treat hypertension, migraines, glaucoma, and phobias. They lower anxiety-related symptoms (fast heart beat, shakiness, palpitations, etc).

Side effects include:

  • decreased heart rate (bradycardia)
  • low blood pressure (hypotension)
  • insomnia and difficulty sleeping
  • depression (as a result of decreased norepinephrine activity in the central nervous system)
  • exhaustion
  • sexual dysfunctions
  • memory impairments