Smoking cessation World No Tobacco Day Workshop 26 May€¦ · Smoking cessation World No Tobacco...
Transcript of Smoking cessation World No Tobacco Day Workshop 26 May€¦ · Smoking cessation World No Tobacco...
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Associate Professor Richard van Zyl-Smit
Smoking cessation World No Tobacco Day
Workshop 26th May
Head Lung Clinical Research Unit UCT lung Institute Head smoking cessation clinic Groote Schuur Hospital Division of Pulmonology and Department of Medicine University of Cape Town
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Declarations
• I actively conduct clinical research for Novartis, Astra Zeneca, GSK, Takeda, Merck, Almirall, Boehringer Ingelheim, Sanofi, Beyer, Teva, Genetech, Roche, Mundipharma
• I have received honoraria for speaking from Aspen/GSK, Pharmadynamics, Pfizer, Astra Zeneca.
• No relationships with the tobacco or E-cigarette industry
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Key points
• No more shouting / Niks meer uitskel nie!
• Must understand and deal with “whole person” and their situation.
• Must encourage individuals to change their own behaviour
• Everybody needs support to quit some will require medication to help
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Case 1
• Mrs B Ored
• Married machinist at clothing factory
• Smokes 4-5 per day
• TB in 2013 stopped smoking for first month then
restarted
• Children asked her to come to the clinic
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Case 2
• Mr TI Mebomb
• 64 years old finance officer for Eskom
• Hypertensive, Diabetic, overweight
• Has tried to quit several times using hypnotherapy,
yoga, cold turkey, gums, sprays and accupuncture
• Dr has told him he will die if he does not quit this
year…
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Case 3
• Mr SE Curity
• 55 years old “provider of security” to Spaza Shops
• Previous CABG, recent MI,
• Smoking 30 per day - Fagerström = 9/10
• Desperate to quit but
– Highly stressful job
– Uses occasional mandrax, dagga, ( heavy in past)
– Can’t afford NRT/Varenicline.
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Legislation Political will
Media/advertising Advocacy groups
Cessation programs Pharmacotherapy/
Counselling
What can we do…
Restaurants Shops Advertising
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In the last ten years
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The harms of smoking are well known
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Tuberculosis HIV
Risk of latent infection
Progression to active disease
Mortality from TB
Post TB structural airway disease
Bronchitis
Accelerated development of COPD
Susceptibility to HIV infection
Bacterial pneumonia in
smokers
Rate of lung cancer
Possible risk of PCP
Accelerates HIV
disease progression
Susceptibility
Mortality
Complicates diagnosis
Respiratory infections
Early emphysema
Lung cancer
Smoke inhalation from tobacco and or biomass fuels
COPD and pulmonary disability
Smoking and Respiratory Health
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Previous work from our lab
Thorax 2014
Human monocyte, Monocyte derived macrophage in vitro exposure model. There was impaired
cytokine production in response to BCG infection.
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Second hand smoke
• Adults
– 25-30% increased risk of Cardiovascular disease
– 20-30% increased risk of Lung Cancer
• Children
– Increased risk for Intrauterine growth retardation (IUGR) and Sudden Infant Death Syndrome (SIDS)
– Increased risk for asthma, middle ear infections, respiratory infections
– Higher likelihood of starting smoking if parents smoke!
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What do we know about South African smokers?
Sitas F ’04, Peer N ‘09, WHO Tobacco Atlas ’12,’15
0%
10%
20%
30%
40%
50%
60%
High income
countries
Low income
countries
RSA 1992 RSA 2003 RSA 2009 RSA 2015
Smoking rates
Men
Women
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Is there anything good about smoking?
‘Skinny jeans’ Smokers weigh less! (Albanes 1987)
Nicotine affects energy homeostasis (Zoli 2012)
Improved cognitive functioning Jarvik 1991
Stress relief
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Alcohol
0 1 2 3 4 580
90
100
110
120
130
140
150
160
170
180
190
200
time (hrs)
Perc
enta
ge o
f B
aselin
e
from Di Chiara Proc Natl. Acad. Sci. 1988
So why are cigarettes so addictive…?
Food
0.0 0.5 1.0 1.5 2.0
100
110
120
130
140
150
160
time(hours)
Perc
enta
ge o
f B
aselin
e
Onset of feeding from Bassareo et al. Neuroscience 1999
Dopamine response to ‘stimuli’
SEX
0.0 0.5 1.0 1.5 2.0 2.5
100
110
120
130
140
150
160
170
180
190
200
Perc
enta
ge o
f B
aselin
e
Female present and copulation onset
from Fiorino et al. J Neuroscience 1997
hrs
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Nicotine
0.0 0.5 1.0 1.5 2.0 2.5 3.0
100
125
150
175
200
225
250
time(hours)
Perc
enta
ge o
f B
aselin
e
Amphetamines
0 1 2 3 4 50
100
200
300
400
500
600
700
800
900
1000
1100
time (hours)
Perc
enta
ge o
f B
aselin
e
Morphine
0 1 2 3 4 5
100
125
150
175
200
225
250
time (hours)
Perc
enta
ge o
f B
aselin
e
Cocaine
0 1 2 3 4 5
100
125
150
175
200
225
250
275
300
325
350
time(hours)
Perc
en
tage o
f B
aselin
e
from Di Chiara Proc Natl. Acad. Sci. 1988
Nicotine compared to other addictive drugs…
Nicotine
0.0 0.5 1.0 1.5 2.0 2.5 3.0
100
125
150
175
200
225
250
time(hours)
Perc
enta
ge o
f B
aselin
e
Amphetamines
0 1 2 3 4 50
100
200
300
400
500
600
700
800
900
1000
1100
time (hours)
Perc
enta
ge o
f B
aselin
e
Morphine
0 1 2 3 4 5
100
125
150
175
200
225
250
time (hours)
Perc
enta
ge o
f B
aselin
e
Cocaine
0 1 2 3 4 5
100
125
150
175
200
225
250
275
300
325
350
time(hours)
Perc
enta
ge o
f B
aselin
e
from Di Chiara Proc Natl. Acad. Sci. 1988
Nicotine
0.0 0.5 1.0 1.5 2.0 2.5 3.0
100
125
150
175
200
225
250
time(hours)
Perc
enta
ge o
f B
aselin
e
Amphetamines
0 1 2 3 4 50
100
200
300
400
500
600
700
800
900
1000
1100
time (hours)
Perc
enta
ge o
f B
aselin
e
Morphine
0 1 2 3 4 5
100
125
150
175
200
225
250
time (hours)
Perc
enta
ge o
f B
aselin
e
Cocaine
0 1 2 3 4 5
100
125
150
175
200
225
250
275
300
325
350
time(hours)
Perc
enta
ge o
f B
aselin
e
from Di Chiara Proc Natl. Acad. Sci. 1988
Nicotine
0.0 0.5 1.0 1.5 2.0 2.5 3.0
100
125
150
175
200
225
250
time(hours)
Perc
enta
ge o
f B
aselin
e
Amphetamines
0 1 2 3 4 50
100
200
300
400
500
600
700
800
900
1000
1100
time (hours)
Perc
enta
ge o
f B
aselin
e
Morphine
0 1 2 3 4 5
100
125
150
175
200
225
250
time (hours)
Perc
enta
ge o
f B
aselin
e
Cocaine
0 1 2 3 4 5
100
125
150
175
200
225
250
275
300
325
350
time(hours)
Perc
enta
ge o
f B
aselin
e
from Di Chiara Proc Natl. Acad. Sci. 1988
Nicotine
0.0 0.5 1.0 1.5 2.0 2.5 3.0
100
125
150
175
200
225
250
time(hours)
Perc
enta
ge o
f B
aselin
e
Amphetamines
0 1 2 3 4 50
100
200
300
400
500
600
700
800
900
1000
1100
time (hours)
Perc
enta
ge o
f B
aselin
e
Morphine
0 1 2 3 4 5
100
125
150
175
200
225
250
time (hours)
Perc
enta
ge o
f B
aselin
e
Cocaine
0 1 2 3 4 5
100
125
150
175
200
225
250
275
300
325
350
time(hours)
Perc
enta
ge o
f B
aselin
e
from Di Chiara Proc Natl. Acad. Sci. 1988
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Is withdrawal really that bad?
• Irritability: 2- 4 weeks
• Tiredness and lethargy: 2-4 weeks
• Poor sleep – 1 week
• Increased cough and phlegm – days to weeks
• Poor concentration – 2-4 weeks
• Hungry – 2-4 weeks
• Craving – days to weeks…
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20 minutes
BP and heart rate drop
12 hours
C0 ⬇ to normal 02 ⬆to normal
48 hours
Smell and taste better
2-12 weeks
Circulation improves Lung function improves
5 years
Mouth, throat, oesophagus & bladder cancer risk ½
Cervical cancer and stroke risk ⬇ to non-smoker level
1-9 months
⬇Coughing and shortness of breath Cilia regain normal function
1 year
Coronary heart disease risk ½ that of a persistent
smoker
15 years
Coronary heart disease risk ⬇ to non smoker
level
10 years
Risk of dying from lung cancer 50% less than
active smoker
So why quit ?
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Two phase approach to successful smoking cessation
S Afr Med J 2013;103(11) 89:869-876
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Not interested
Let me try Freedom
from tobacco
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Readiness to change
permanent exit?
contemplation
Pre-contemplation
preparation /
determination
action
maintenance
relapse
1
2 3
4
5 6
Prochaska and DiClemente, 1982
Slide courtesy Prof B Mash U Stell
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• Ask
– About why they smoke, do they know the risks and benefits from quitting and do they want to quit?
• Alert
– About the benefits and options
• Assess
– Are they ready to quit
• Assist /arrange
– Get them someone/somewhere/something to help
How to get your patient/client to a point of wanting to quit?
Slide courtesy Prof B Mash U Stell
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• Your goal/responsibility is not to get each patient to quit at that specific visit…
• Your aim is to inch them along the path to a point where they ask for help to quit…
Ask about smoking at each visit
Encourage them about the benefits of quitting
Give them something to read at home
Invite them to think about it and offer help if needed
The goal of each Health Care Interaction …
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The balance of counselling and medication
All the counselling and support in the world will not prevent withdrawal symptoms.
All the drugs in the world will not change your social stressors, work place or relationship issues nor
concerns about your weight!
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Counselling plus medication to treat nicotine withdrawal is more effective than either intervention alone.
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• > 70 Cochrane reviews on smoking related subjects…
– NRT, acupuncture, hypnosis
– Electronic aids, SMS support
– Hospitalised patients
– Abrupt vs. slow reduction
– Vaccines, antidepressants
The value of steroids for lung maturity in premature
neonates
Do we have evidence for what works
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Smoking cessation “medication”
• Nicotine replacement therapy
• gums, sprays, patches
• “Antidepressants”
• Nicotine receptor agonists
• ?? “Electronic cigarettes”
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Efficacy of available medications
Medication Number of arms OR (95%CI Estimated abstinence rate (95%CI)
Placebo 80 1.0 13.8
Nicotine gum 15 1.5 (1.2-1.7) 19.0 (16.5-21.9)
Nicotine patch 32 1.9 (1.7-2.2) 23.4 (21.3 -25.8)
Nicotine spray 4 2.3(1.7-3.0) 26.7 (21.5-32.7)
Bupropion SR 26 2.0 (1.8-2.2) 24.2 (22.2-26.4)
Nortriptylline 5 1.8 (1.3-2.6) 22.5 (16.8-29.4)
Clonidine 3 2.1(1.2-3.7) 25.0 (15.7 -37.3)
Varenicline (2mg/day) 5 3.1 (2.5-3.8) 33.2 (28.9-37.8)
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Nicotine Replacement Therapy
• Generally considered “first choice”
– Directly treats nicotine dependence and withdrawal
– Nicotine patches will be available in June 2015!
• “controller and reliever approach” highly effective:
– Patch plus gum ( more effective but more expensive!)
– OR 3.6 (2.5-5.2) / abstinence rates 36.5% (28.6-45.3)
• Can be combined with ‘antidepressants’
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Antidepressants
• Bupropion SR (ZYBAN) – Effective but significant tolerability issues – NB risk of seizures – January 8th 2013 drug safety warning regarding congenital
cardiovascular malformations
• Nortriptyline – Effective but generally considered second line
• (not amitriptyline – no data)
• SSRIs ( Fluoxetine, Citalopram, Sertraline) – Not effective
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Nicotine receptor agonists
• α4β2 receptor partial agonists
– ‘partially open the receptor’ – controlled dopamine release but block the effect of nicotine
– Reduces the ‘pleasure of smoking’
– Varenicline (CHAMPIX)
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Varenicline
• Effective smoking cessation medication (in combination with behavioural change)
• Major side effects – nausea, bizarre dreaming, altered mood
• Black box warning regarding suicide and CVS risk
– Note: Schedule 5 medication
3 month Pooled RR (95%CI)
6 month Pooled RR (95%CI)
12 month Pooled RR (95%CI)
Varenicline vs. buproprion 1.43 (1.24-1.63) 1.34 (1.13-1.57) 1.61 (1.32 -1.93)
Varenicline vs. NRT 1.48 (1.23-1.75) 1.38 (1.15-1.64) * 1.65 (1.29-2.07)
Mills meta-analysis and MTC 2012
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Suicide and self harm
• Kyla Thomas BMJ 2013
– Clinical practice database
– - 119 546 adults
• 81545 NRT,
• 6741 Bupropion
• 31 260 Varenicline
NRT Varenicline Bupropion
Incidence of Self-harm /100,000 person years (95% CI)
359.5 (279.7 - 454.9) 258.0 (155.4 - 403.0)
246.6 (67.2 -631.4)
Hazard ratio Self Harm 1 0.88 (0.52 to 1.49) 0.83 (0.3. to 2.31)
Hazard ratio Treated depression 1 0.75 (0.65 to 0.87) 0.63 (0.46 to 0.87)
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• Nicotine replacement – Nicotine Spray (S2)
• 4 x 20ml = R306 up to 90 sprays/day – 3-4 weeks per dose(4) ~40 spray/day = 7 days/bottle R306/month
– Nicotine gum (S0) • 2mg/4mg (30) = R69.31 10-12 pieces per day
– 10-5/day = R70/3days ~R600-R300 per month
– Nicotine patches (Not available yet) • 52.5mg/35mg/17.5mg (7) ~R100-120?
– 4weeks x R100 =? R400 per month
• Bupropion SR (S5) • 150mg (60) R351
– 150mg BD = R351 per month
• Varenicline (S5) • 1mg (56) Starter pack and continuation phase pack
– Monthly pack = R439.50/R423.77 per month
Relative cost of specific medications (usually 3 month programme)
Estimated SEP costs Manufacturer pricing report
Pack/day = R20 = R600 /month
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General approach to cessation with medication
Counselling and motivation Titrate up medication 0-7 days
Bupropion 150mg daily, then twice daily Varenicline 0.5mg build up to 1mg bd
Quit date
“12 week programme”
“Prevent” relapse
Success
“cut down on smoking”
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Case 1
• Mrs B Ored
• Married machinist at clothing factory
• Smokes 4-5 per day
• TB in 2013 stopped smoking for first month then
restarted
• Children asked her to come to the clinic
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Case 2
• Mr TI Mebomb
• 64 years old CEO of investment firm
• Hypertensive, Diabetic
• Has tried to quit several times using hypnotherapy,
yoga, cold turkey, gums, sprays and accupuncture
• Dr has told him he will die if he does not quit this
year…
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Case 3
• Mr SE Curity
• 55 years old “provider of security” to Spaza Shops
• Previous CABG, recent MI,
• Smoking 30 per day - Fagersrtröm = 9/10
• Desperate to quit but
– Highly stressful job
– Uses occasional mandrax, dagga, ( heavy in past)
– Can’t afford NRT/Varenicline.
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Bringing it back to you…
• With an unmotivated patient:
– Advise them on the benefits of quitting (don’t shout!)
– Give them something to read and chat about it next time…
• With a motivated patient…
– Assess dependence (Fagerström, CO levels)
– Assess psychological stressors/support
– Assess finances…
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Practical approach in reality…
• Set quit date and decide on strategy
– Slowly cut down with or without medication to specified date
– Encourages patient to develop coping strategy/plans
• Best to have them ready before quit date
– Review as often as possible (in-person, text, cell phone apps)
– Watch out for withdrawal or side effects
– You don’t need to be a specialist – just passionate (the more the better)
– Follow up to at least 3 months – watch out for relapse
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Electronic Cigarettes My personal opinion, based on the current evidence
• If you are a smoker:
– Do everything you can to quit
– E-cigarettes may help & should be safer
– Consider e-cigarettes as a stepping stone
• If you are a non-smoker
– Avoid smoking, and e-cigarettes “> 50 year lag in smoking-cancer epidemiology”
– Evidence to support public space use ban
• If you have influence with adolescents
– Counsel strongly against e-cigarette use • High potential for nicotine addiction
• ???? Better than children smoking tobacco????