Exam 1: Herbals Flashcards
Acai: Uses
Weight loss
Acai: Efficacy
Insufficient evidence
Acai: Adverse effect
Generally well tolerate
Acai: Other information to know
Chagas disease (parasitic protozoan) from raw fruit and juice
Bitter orange: Uses
Weight loss
Bitter orange: adverse effects
Prolongs QT interval
Potential cardiac adverse effects
Bitter orange: What other drug is it related to?
Ephedrine
Herbals: The use of ____ has been banned by many sport organizations
Bitter orange
Black cohosh: Uses
Menopause (hot flashes)
Black cohosh: efficacy
questionable – may reduce frequency compared to baseline but not placebo?
Not effective for hot flashes related to cancer
Black cohosh: adverse effects
Reports of liver damage (if long-term use, check LFTs) Weight gain Breast tenderness Headache Rash GI complaints
Black cohosh: contraindication
Pregnancy (causes uterine contractions, increased risk of miscarriages)
Black cohosh: MOA
More like SSRIs than phytoestrogens
Caffeine: Uses
Mental acuity
Weight loss
Caffeine: Efficacy
Possibly effective when combined with thermogenic agents
Caffeine: Adverse effects
Increased HR
Diuretic effects
Increased BP
Caffeine: What happens when you have high doses?
Increase anxiety and decrease in mental acuity
Cranberry: Uses
UTI
Cranberry: efficacy
Prevention: mixed results on pt population
Treatment: not effective
Cranberry: Adverse effects
Well tolerated
Cranberry: MOA
Not related to acidification of urine but rather prevents bacterial adhesion to uroepithelial cells
Cranberry: Interactions
May inhibit CYP3A4
Warfarin (increases INR)
Echinacea: Uses
Common cold
Echinacea: Efficacy
Limited effectiveness for prevention
Doesn’t affect duration
Echinacea: Adverse effects
GI complaints
Rash (especially children)
Allergic reactions
Echinacea: contraindications
Autoimmune disorders Asthma Ragweed allergy Atopy Allergic rhinitis
Which herbal is contraindicated with pregnancy?
Black cohosh – increases uterine contractions, potential miscarriage risk
Which herbal is contraindicated with ragweed allergy?
Echinacea
Ephedra: Use
Weight loss
Ephedra: Adverse effect
Heart attack Arrhythmia Stroke Psychosis Seizures Death
Ephedra: Other
BANNED, DO NOT RECOMMEND
Fish Oil: Uses
Cholesterol
Fish oil: 2 types
EPA and DHA
Fish oil: Uses
Hyperlipidemia: decreases TG (high doses, Rx)
Reduces BP modestly (2-5 SBP/1-3 DBP)
Mental development (infants)
Dietary fish oil reduces risk of CHF by 15%
Fish oil: Dietary fish oil reduces risk of _____
CHF by 15%
Fish oil: adverse effects
Fishy burp Halitosis Heartburn Loose stool May increase LDL slightly
Fish oil: Tips for AE
Take with meals, freeze caps, use EC to minimize AE
Fish oil: What happens if you take a dose >3g/day?
Many inhibit platelet aggregation
Fish oil: AHA recommendation
2 servings/week, non-fried fish in place of other proteins
Flaxseed: Uses
Menopause (40g/day)
Flaxseed: Efficacy
Questionable (most people unwilling/unable to take dose needed for efficacy)
Flaxseed: Adverse effects
Bloating
Flatulence
Abdominal pain
Diarrhea
Flaxseed: What is the efficacious dose and what is the issue?
40g/day, has high fat and calorie content (most people unwilling, it’s a lot)
May take 1-2 months to see beneficial effects
Flaxseed: Can you see beneficial effects right away?
No – takes 1-2 months
Garcinia: Uses
Weight loss
Garcinia: Efficacy
2020 review found no significant effect on weight loss
Garcinia: Adverse effect
Mild GI Hepatotoxicity (requiring transplant[!] - not worth) Abdominal pain Jaundice Confusion
Garcinia: Active ingredient
Hydroxycitric acid (HCA)
Garlic: Uses
HTN
Cholesterol
Garlic: Efficacy
HTN: Limited (decreases SBP 7-8%)
Cholesterol: None (recent studies)
Garlic: Adverse effects
Heartburn
Flatulence
N/V
Contact dermatitis
Garlic: How long do you have to take it for benefits?
Over 2 months
Garlic: Interactions
Antiplatelet agents, anticoagulants
Induces p-gp efflux pump (decrease serum conc. of p-gp substrates)
Ginkgo: Uses
Dementia
Peripheral arterial disease
Ginkgo: Efficacy
May improve cognition in patients with dementia Recent RCTs (GEM): not effective for prevention or slowing progression
Ginkgo: Adverse effects
Allergic reactions (poison oak, poison ivy, mango rind) Bleeding
Ginkgo: Interactions
Avoid use with meds that lower seizure threshold – ginkgotoxins found in seeds can cause seizures
Induce 2C19
Anticoagulants/antiplatelet agents – increased bleeding (stop 2 weeks before surgery)
Ginseng: Uses
General well being
Immune stimulant
Sexual dysfunction
Ginseng: Efficacy
Minimal: depends on indication
Ginseng: Adverse Effects
Headache
Insomnia
Estrogenic effects (mastalgia, vaginal bleeding, amenorrhea)
Ginseng: Interactions
Antiplatlet/anticoagulants - increased bleeding risk
Diabetes meds: risk of hypoglycemia
Glucosamine: Uses
Osteoarthritis
Glucosamine: Efficacy
Sulfate form effective for osteoarthritis of the KNEE but not hip
Glucosamine: Adverse effect
Mild GI complaints
Glucosamine: Contraindication
Anaphylaxis to shellfish – derived from exoskeleton of shellfish (not meat) OR use synthetic
Herbal T/F: Glucosamine is derived from the meat of shellfish
False – it is derived from the exoskeleton
Glucosamine: interaction
Warfarin: increases INR
Melatonin: Uses
Insomnia
Jetlag
Melatonin: Efficacy
Possibly effective (better results in elderly)
Melatonin: adverse effects
Well tolerated
Melatonin: MOA
Regulates circadian rhythms
Melatonin: Dosing
Insomnia dose: 2-3mg QHS
Melatonin is synthetic derivation of a natural hormone that is secreted from ____
Pineal gland
Red clover: Uses
Menopause (hot flash)
Red clover: Efficacy
Mixed evidence but most studies show no benefit over placebo
Red clover: Adverse effects
Nausea
Myalgia
Vaginal spotting
Red clover: Interactions
Increased risk of bleeding with antiplatelet agents or anticoagulants
Avoid if taking tamoxifen or hx of breast cancer
SAMe: Uses
Depression
SAMe: efficacy
Insufficient evidence
SAMe: Adverse Effects
Headache
Insomnia
N/V/D
SAMe: MOA
Increases serotonin, NE, dopamine
SAMe: Other issues
Issues with product quality and cost
Saw palmetto: Uses
BPH
Saw palmetto: Efficacy compared to 5-a reductase inhibitors
Similar
Saw palmetto: Efficacy compared to alpha-1 blockers
Less effective
Saw palmetto: Adverse effects
Dizziness Headache Decreased libido GI Complaints Prolonged bleeding time
Saw palmetto: MOA
Antiandrogenic, anti-proliferative, anti-inflammatory, 5-a reductase activity
Saw palmetto: How long does it take to see benefits?
1-2 months to see improvement
Saw palmetto: Other issues
Issues with contamination/adulteration of products in clinical trials – raised questions about efficacy
Soy: Uses
Menopause (hot flashes)
Cholesterol
Soy: Efficacy
Modest benefit (PROTEIN) – takes up to 2 months to work
Protein: modest benefit (LDL decreases 10%)
Possible benefit for BP for people with HTN
Soy: T/F Soy protein is equivalent to soy supplements
False - soy protein (food) is better than supplements
Soy: Adverse effects
Well tolerated
Soy: Interactions
Avoid supplements if taking tamoxifen or hx of breast cancer (estrogen-dependent)
St. John’s Wort: Uses
Depression
St. John’s Wort: Efficacy
Effective for mild to moderate depression
High placebo effect
St. John’s Wort: Adverse effects
Dizziness Insomnia Vivid dreams Restlessness Fatigue Dry mouth Photosensitivity *
St. John’s Wort: MOA
Similar to SSRIs/SNRIs
St. John’s Wort: How long does it take to see benefits:?
3-4 weeks for maximal effect, taper when d/c
St. John’s Wort: Which isoenzymes does it affect and how (induce/inhibit)
Induces 3A4/p-gp (strong):
- Digoxin, benzodiazepines, oral contraceptives, phenytoin, protease inhibitors, NNRTIs, warfarin
Induces 1A2/2C9/2C19 (mild)
St. John’s Wort: Interactions
Induces 3A4/p-gp (strong): Benzodiazepines, oral contraceptives, phenytoin, protease inhibitors, NNRTIs, warfarin, other serotonergic meds
Induces 1A2/2C9/2C19 (mild)
Use with caution with other serotonergic agents
Valerian: Use
Insomnia
Valerian: Efficacy
Possibly effective
Valerian: Adverse effect
Headache
Nervousness
Excitability
Hepatotoxicity (rare)
Valerian: MOA
Benzodiazepine-like effects at GABA receptors
Valerian: How long does it take to see benefit?
May take several days/weeks to see full effect – taper when d/c
Which herbals are recommended to taper when discontinuing?
St. John’s wort and valerian
Which herbals may cause hepatotoxicity?
Valerian (rare) and Garcinia
Which herbals may increase bleeding risk?
Ginkgo, ginseng, red clover, and saw palmetto (prolonged bleeding time)