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Table 8-15

HerbAction/UseCautionDrug Interactions
DHEA (dehydroepiandrosterone)
  • Depression
  • ↓ Fatigue
  • Hx of prostatic or breast carcinoma
  • Hepatic dysfunction
  • Diabetes
  • Antidiabetic agents
  • Estrogen
  • Corticosteroids
Ginkgo biloba
  • ↑ Mental function (e.g., Alzheimer’s disease)
  • Antiplatelet agent
  • CNS stimulant
Contraindication:
  • Discontinue 2 wk before surgery
  • Blood clotting disorder
  • Renal failure
  • Acute infection
  • ↑ or ↓ BP
  • Blood-thinning medications (e.g., Coumadin, heparin, NSAIDs, ASA)
  • Hormonal
  • Monoamine oxidase (MAO) inhibitors
  • Antihypertensives
  • Caffeine
  • Decongestants
Ginseng
  • ↓ Fatigue, stress
  • ↑ Mental alertness
  • ↑ Physical endurance
  • ↑ Appetite
  • Antidepressant
  • ↑ Immune response
Contraindicated with:
  • Peptic ulcer
  • Intracranial bleeding
  • Elderly with cardiovascular disease
  • Diabetes
  • MAO inhibitors
  • Antihypertensives
  • Barbiturates
  • Anticoagulants
  • Insulin and oral hypoglycemics
  • Digoxin
Kava
  • ↓ Anxiety
  • ↓ Stress
  • ↓ Restlessness
  • ↑ Sleep (↓ insomnia)
  • ↑ Relaxation
  • Discontinue after 3 mo (yellow hair, skin, nails)
  • Reaction:
    • Euphoria
    • Depression
    • Somnolence
    • Eye accommodation disturbance
    • Muscle weakness
  • Alcohol/CNS depressants
  • Barbiturates
  • Antipsychotics (e.g., Haldol)
  • Antianxiety drugs (Valium, Xanax, Ativan)
  • ↓ Effects of levodopa (Parkinson’s disease)
  • Statins (liver injury)
SAMe (S-adenosylmethionine)
  • Depression (not bipolar)
  • Bleeding
  • Other antidepressants (MAO inhibitors, tricyclic antidepressants [TCAs], selective serotonin reuptake inhibitors [SSRIs])
  • Potentiates St. John’s wort
St. John’s wort
  • ↓ Mild depression
  • ↑ Panic, agitation, confusion
  • ↑ Skin sensitivity in sun (if also on sulfa, Feldane, Prilosec, Prevacid)
  • ↑ Serotonin level if on antidepressants (e.g., MAO inhibitors, SSRIs, TCAs)
  • Reduces effect of:
    • Digoxin
    • Immunosuppressants
    • Protease inhibitors (HIV)
    • Oral contraceptives
    • Coumadin
    • Theophylline (asthma)
    • Antipsychotics (e.g., clozapine)
    • Chemotherapy
Valerian
  • Minor tranquilizer
  • Anxiety, panic attacks
  • Sleep disorders (insomnia)
  • Light-headedness
  • Restless
  • Fatigue
  • Nausea
  • Tremor
  • Blurred vision
  • Potentiates other CNS depressants (e.g., alcohol)
  • Benzodiazepines (e.g., Xanax, Valium)
  • Anticonvulsants (e.g., Dilantin, phenobarbital)
  • Antidepressants (e.g., Elavil, Tofranil, Prozac)
  • Avoid taking with substances that cause drowsiness