II. Causes: Anxiety Secondary to Medications or Illicit Drug use

III. Causes: Anxiety due to medication or Substance Withdrawal

  1. Nicotine withdrawal
  2. Benzodiazepines withdrawal
  3. Beta-Blocker withdrawal
  4. Alcohol Withdrawal
  5. Opioid Withdrawal
  6. Anticholinergic withdrawal
  7. Caffeine withdrawal

IV. Causes: Anxiety secondary to cardiopulmonary disease

VI. Causes: Anxiety secondary to neurologic disease

VII. Causes: Anxiety secondary to miscellaneous conditions

  1. Inner ear disease
    1. Labyrinthitis
    2. Meniere's Disease
  2. Chronic Fatigue Syndrome
  3. Acute Hyperventilation syndrome
  4. Wilson's Disease
  5. Acute intermittent porphyria
  6. Lead Poisoning
  7. Systemic Lupus Erythematosus

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