Herbals Flashcards

1
Q

What is CAM?

A

A group of diverse medical and health care systems, practices, and products, that aren’t considered to be part of conventional medicine

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2
Q

What are herbal products?

A

Medicinal agents obtained from plants

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3
Q

Are herbal products considered dietary supplements?

A

Yes

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4
Q

Give me some examples of herbs

A

Flowering plants, shrubs, trees, moss, ferns, algae, seaweed, fungus, flowers, fruits, leaves, twigs, bark, roots, and seed.

Basically, fucking everything.

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5
Q

Decade when natural health had a rebirth

A

1960’s

Fuckin’ hippies, man

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6
Q

The Office of Alternative Medicine (NIH) was established in 1991 for this reason

A

Cost of healthcare was rising –> trying to make more options

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7
Q

The National Center for Complementary and Alternative Medicine (CAM NIH) was formed in 1998 for this reason

A

To research the efficacy of CAM options

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8
Q

As part of the Dietary Supplementand Health Education Act, the FDA created a “dietary supplement” category in 1994(under which herbal remedies fall). Tell me about this category of “medications”

A

Require no proof of efficacy or safety
Sets no quality control standards
They are exempt from pharmaceutical regulations

The products MAY claim an effect (boots immune system), but can’t claim a cure or treatment (treats colds)

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9
Q

Due to the lack of control of for efficacy, safety, or quality control in herbals, consumers do not know…

A

1) If active ingredients are even in the product
2) If ingredients are bioavailable
3) If the dosage is appropriate
4) If each bottle or even each pill has the same components

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10
Q

Give me an example of the poor quality control seen in herbal supplements

A

Amount of Ginseng and potency of Ginseng varies widely between manufacturers and even between batches.
The potency of Ginsenosides (active ingredient) varied WIDELY between manufacturers and batches
Labels were inaccurate
The ginseng was contaminated with other substances like scopolamine and heavy metals
Additives were not on the label (NSAIDs, steroids, sedatives, etc)

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11
Q

Why aren’t manufacturers compelled to do trials to prove efficacy?

A

1) They aren’t required to

2) They wouldn’t be able to recover the cost of proving that the herbal is safe

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12
Q

The claims of an herbal’s efficacy is mostly based on

A

anecdotal reports

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13
Q

Are toxicities for herbals listed?

A

No.
Toxicities are determined by clinical trials, which herbals do not undergo. Plus each pill/batch/manufacturer all have different ingredients and doses so it would be impossible to control

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14
Q

Classification system of herbal safety and toxicity

A

Class 1: Safe if used appropriately
Class 2: Restrictions unless otherwise directed
a) External use only
b) Do not use if pregnant
c) Do not use i f breastfeeding
Class 3: Only use under the supervision of an expert
Class 4: Insufficient data is available

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15
Q

__% of Americans use some sort of CAM

A

35%

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16
Q

__% of Americans presenting for surgery use herbal medications

A

23%

50% take multiple herbs
25% also take prescription drugs

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17
Q

__% of those using herbs don’t tell their doctor or anesthesia provider

A

70%

Need to ask them about it because often people don’t think of herbs as worth mentioning!

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18
Q

Profile of the typical herbal user

A

White, college educated females
40-60 years old
Patients undergoing neuro and OBGYN procedures

19
Q

Ways in which herbal medications affect the perioperative period

A

1) Direct intrinsic effects
- Predictable SE like bleeding

2) Pharmacodynamic interactions
- Alteration of the action of other dugs

3) Pharmacokinetic interactions
- Altered absorption, distribution, metabolism, and elimination of other drugs

20
Q

It is recommended that pts stop taking herbals ___ days before surgery

A

14

This is recommended by both the ASA and AANA, but is unrealistic because no one sees pts this far in advance of surgery

21
Q

What is Kava Kava?

A

Polynesia plant
CNS depressant, sedative, and anxiolytic
(Sounds kinda of like a benzo!)
This med will prolong our anesthetic

22
Q

Anesthesia concerns with Kava Kava

A

Potentiates the sedative effects of our anesthetics

Potential for addiction, tolerance, and W/D

SE: HA, dizziness, ataxia, sluggish reflexes, and GI discomfort

Long-term use can cause dry, scaly skin and yellow discoloration of skin and nails, photosensitivity, and hepatotoxicity***

23
Q

Valerian

A

Sedative, mild anxiolytic, sleep aid

Potentiates the sedative effect of our anesthetics (avoid with opioids, benzos, and barbs)

SE: HA, excitability, ataxia, and GI discomfort

Can have W/D symptoms that are more severe than Kava Kava (delirium and cardiac abnormalities)

24
Q

St. John’s Wort

A

“Prozac alternative” used to treat depression.

SE: Photosensitivity**, allergic reactions, HA, dizziness, restlessness, fatigue, GI upset, and has additive effects with anesthesia

25
Q

St. John’s Wort is cannot be taken with these medications

A

MAOIs

Will lead to serotonin syndrome

26
Q

St. John’s Wort induces the CYP450. It should be used with caution with these drugs:

A

Indinovir (HIV med), cyclosporines, digitalis, BBs, CCBs phenobarb, phenytoin, birth control, benzos, coumadin, alfentanil, lidocaine, steroids, and NSAIDs

27
Q

Major SE with Ginko Biloba

A

Bleeding! Inhibits PAF and platelet aggregation. Will enhance the anticoagulant effect of other anticoagulants, especially those that inhibit platelet aggregation (coumadin, NSAIDs, and ASA)

It’s used to improve cognitive function and circulation.

28
Q

Uses for Ginko

A

Improve cognitive function and circulation.

29
Q

Use for Garlic

A

To treat HTN and high cholesterol

May also have anti-cancer properties.

30
Q

Our main anesthesia concerns with Garlic

A

1) Bleeding
- Inhibits plt aggregation and causes fibrinolysis
- Bleeding risk enhanced when combined with other meds to inhibit plt aggregation (warfarin)

2) Hypotension

31
Q

Ginseng use and SE

panax quinquefolius

A

“Pep Pill”

Used as a mood and energy booster! Also protects against stress and restores homeostasis.

SE: Hypoglycemia and bleeding (inhibition of plt aggregation)

32
Q

Anesthesia concerns with Ginseng

A

1) They get too peppy! Transient nervousness, excitation, tachycardia, , HTN, epistaxis, HA, insomnia, allergies, fluid/electrolyte abnormalities
2) Hypoglycemia

3) Bleeding risk
- Avoid ASA and NSAIDs
- May decrease the effectiveness of warfarin

33
Q

Saw Palmetto use and SE

A

Used to treat BPH

Also has anti-inflammatory effect via inhibition of COX (will also cause bleeding)

34
Q

Ephedra use and SE

A
Has direct AND indirect sympathomimetic effects (just like ephedrine!)
CNS stimulant (can cause seizures)

Used as weight loss aid. Also to increase energy and treat asthma.

35
Q

What is the active ingredient of ephedra?

A

Ephedrine!

36
Q

Anesthesia concerns with ephedra

A

All s/s of ephedrine: HTN, tachycardia, arrhythmias, vasoconstriction, and vasospasm

DANGERS: MI, myocarditis, stroke, agitation, shaking, anxiety, insomnia, psychosis, seizures, nervousness, and panic attacks

37
Q

Those taking ephedra can develop ___ by depleting endogenous NE stores. This can result in hemodynamic instability.

A

Tachyphylaxis

38
Q

Ephedra has a life-threatening interaction with

A

MAOIs

39
Q

Echinacea is used for

A

It boosts the immune system! (Short-term)

Prophylaxis and treatment of infections (especially URIs)

40
Q

Anesthesia concerns for Echinacea

A

1) Allergic reactions (boosts the immune system too much), especially in those with asthma, atophy, and allergic rhinitis

2) Prolonged use can overstimulate the immune system and actually cause immunosupression
- Avoid in those with systemic disorders (TB, MS, HIV, and other autoimmune diseases)

3) Hypoglycemia
4) Hepatotoxicity

41
Q

Melatonin

A

1) Hormone that naturally controls the sleep-wake cycle
2) Used to treat insomnia, jet lag, etc

It readily crosses the BBB and increases the sedative effects of hypnotics/benzos (has actually been studied as a pre-op anxiolysis drug)

42
Q

Melatonin may interact with these meds

A

Anticoagulants
Immunosuppressants
DM meds
BCP

43
Q

If St. John’s Wort is taken with MAOIs, it can lead to this

A

Central Serotonin Syndrome

44
Q

This herbal may decrease the effectiveness of warfarin

A

Ginseng