Tobacco use disorder.pptx

Tobacco-Related Disorders
Dr. INENA WA INENA Gaylord
Supervisor: Professor RUKUNDO
-Psychiatry Department-

OUTLINE
• Vignette
• Introduction
• Epidemiology
• Physiopathology
• Clinical features
• Diagnosis
• Treatment
• Health benefits of smoking cessation
• References

vignette
• Ms. H was a 45-year-old patient with schizophrenia who smoked 35
cigarettes per day.
• She began her cigarette use at approximately 20 years of age during the
prodromal stages of her first psychotic break.
• During the first 20 years of treatment, no psychiatrist or physician advised
her to stop smoking.
• When the patient was 43 years of age, her primary physician
recommended smoking cessation.
• Ms. H attempted to stop on her own but lasted only 48 hours, partly
because her housemates and friends smoked.
• During a routine medication check, her psychiatrist recommended that she
stop smoking, and Ms. H described her prior attempts.
• The psychiatrist and Ms. H discussed ways to avoid smokers
and had the patient announce her intent to quit and request that her
friends try not to smoke around her and to offer encouragement for her
attempt to quit.
•

…
• The psychiatrist also noted that Ms. H became irritable, slightly
depressed, and restless and that she had insomnia during prior
cessation attempts, and thus recommended medications.
• Ms. H chose to use a nicotine patch plus nicotine gum as needed.
• The psychiatrist had Ms. H call 2 days after she attempted to quit
smoking.
• At this point, Ms. H stated that the patch and gum were helping.
• One week later, the patient returned after having relapsed back to
smoking.
• The psychiatrist praised Ms. H for not smoking for 4 days. He
suggested that Ms. H contact him again if she wished to try to stop
again.
• Seven months later, during another medication check, the
psychiatrist again asked Ms. H to consider cessation, but she was
reluctant.

…
• Two months later, Ms. H called and said she wished to try
again.
• This time, the psychiatrist and Ms. H listed several
activities that she could do to avoid being around friends
who smoked, phoned Ms. H’s boyfriend to ask him to assist
her in stopping, asked the nurses on the inpatient ward to
call Ms. H to encourage her, plus enrolled Ms. H in a
support group for the next 4 weeks.
• This time the psychiatrist prescribed the non-nicotine
medication varenicline and followed her with 15-minute
visits for each of the first 3 weeks.
• She had two “slips” but did not go back to smoking and
remained an ex-smoker.
(Adapted from John R. Hughes, M.D.)

Introduction
Tobacco use disorder
-Among the most prevalent, deadly, and costly of
substance use disorders.
- Tobacco is a legal drug
- Tobacco does not cause behavioural problems
(Difference from others)
- One of the most ignored, particularly by psychiatrists.
- Few of psychiatric treatment or reference.
- Most of the stop tobacco use are without treatment.
- Erroneous view :‘’ smokers do not need treatment’’

…
Psychiatrists have a role?
Yes
-High mortality and prevalence (TU) among psychiatric
patients;
-Increased psychiatric problems and need of intensive
treatments among remaining smokers. And,
-Development of multiple pharmacologic agents to aid
smokers in quitting.

Epidemiology
WHO estimations
. 1 billion smokers worldwide, and more men than
women smoke.
• Decreased prevalence of smoking in the Western
Eastern Mediterranean VS Increasing number in Africa
regions.
• Tobacco is commonly smoked in cigarettes, as well as
in cigars, snuff, chewing tobacco, and pipes.
• Increasing prevalence of vaping and the use of e-
cigarettes.

…
• From the 70 percent of smokers indicate that they
want to quit,
• More than 50 percent tried to quit
• 30 percent remain abstinent for even 2 days,
• 5 to 10 percent stop permanently.
• 90 percent of successful attempts to quit involves no
treatment.
• With the advent of OTC and non-nicotine medications
in 1998, increased involved the use of medication.

…
• 20 percent of the population develop tobacco
dependence at some point(most prevalent
psychiatric disorders).
• 85 percent of current daily smokers are
tobacco-dependent.
• Tobacco withdrawal occurs in about 50
percent of smokers who try to quit.
• 14 percent of Americans smoke.

…
Sub-Saharan Africa
• Available data in 13 countries
-Egypt,highest prevalence of smoking among
adult (40% M. /18% F.)
-Ethiopia, lowest (6% M.<0.5%F)
-South Africa, Botswana, Mali and Mauritius had
comprehensive anti-tobacco laws ( taxation,
advertising bans, smoking restrictions and
effective cessation and education programmes

…
In East Africa
• Kenya has the highest prevalence, with rates
of above 50% in diverse populations
• In Uganda, Available prevalence (among High
school students ): 16.6 to 5.3%

Education
• Level of education attainment correlated with
tobacco use.
• Of adults who had not completed high school,
23 percent smoked cigarettes / 7 percent of
college graduates smoked.

Psychiatric Patients
High proportion of psychiatric patients smoke.
• 50 percent of all psychiatric outpatients,
• 70 percent of outpatients with bipolar I disorder,
• 90 percent of outpatients with schizophrenia, and
• 70 percent of patients with substance use disorder smoke.
• Less successful in attempts to quit for patients with
depressive disorders or anxiety disorders
( So, Holistic health approach is needed).
• High percentage of patients with schizophrenia smoke for
self-monitoring to relieve distress.
(Hallucinations, concentration)

PATHOPHYSIOLOGY
NICOTINE:
• The psychoactive component of tobacco.
• Affects the CNS by acting as an agonist at the nicotinic subtype
of acetylcholine receptors.
• 25 percent of the nicotine inhaled during smoking reaches the
bloodstream,
• Nicotine reaches the brain within 15 seconds.
• The half-life of nicotine is about 2 hours.
• Produces its positive reinforcing and addictive properties by
activating the dopaminergic pathway projecting from the VTA
to the cerebral cortex and the limbic system.

…
In addition, nicotine causes
• An increase
in the concentrations of circulating
norepinephrine and epinephrine and,
in the release of vasopressin, β-endorphin,
adrenocorticotropic hormone (ACTH), and
cortisol.
These hormones contribute to the primary
stimulatory effects of nicotine on the CNS.

…
Adverse Effects of Nicotine
• Nicotine is a highly toxic alkaloid.
• Doses of 60 mg in an adult are fatal secondary to respiratory paralysis.
• Doses of 0.5 mg are delivered by smoking an average cigarette.
• In low doses;
The signs of nicotine toxicity include:
-nausea, vomiting, salivation, pallor(caused by peripheral vasoconstriction).
- weakness, abdominal pain, diarrhea, (caused by increased peristalsis).
- dizziness, headache, increased blood pressure, tachycardia, tremor, and
cold sweats.

…
• Toxicity is also associated with an inability to
concentrate, confusion, and sensory
disturbances.
• Nicotine is further associated with a decrease in
the user’s amount of REM sleep.
• Tobacco use during pregnancy is associated with
an increased incidence of low–birth-weight
babies and an increased incidence of newborns
with persistent pulmonary hypertension.

…
• Smoking (mainly cigarette smoking) causes cancer of
the lung, upper respiratory tract, esophagus, bladder,
and pancreas and probably of the stomach, liver, and
kidney.
• Smokers are 15 to 30 times more likely than non
smokers to develop lung cancer, and lung cancer has
surpassed breast cancer as the leading cause of cancer-
related deaths in women.
• Despite these staggering statistics, smokers can
dramatically lower their chances of developing smoke-
related cancers by merely quitting.

…
Death
• is the primary adverse effect of cigarette smoking.
• Tobacco use is associated with more than 400,000
premature deaths each year in the United States, which
is 20 percent of all deaths.
• Individuals who smoke tend to die 10 years earlier than
nonsmokers.
• Tobacco smoke causes nearly 30 percent of cancer
deaths in the United States, making tobacco the single
most lethal carcinogen in the United States
• The increased use of chewing tobacco and snuff
(smokeless tobacco) is associated with the development
of oropharyngeal cancer.

Risk and Prognostic Factors
• Temperamental : Individuals with externalizing personality traits are more likely
to initiate tobacco use. Children with attention-deficit/hyperactivity disorder or
conduct disorder, and adults with depressive, bipolar, anxiety, personality,
psychotic, or other substance use disorders, are at higher risk for starting and
continuing tobacco use and of tobacco use disorder.
• Environnemental : Persons with low incomes and low educational levels are
more likely to initiate tobacco use and are less likely to stop.
• Genetic factors : contribute to the onset of tobacco use, the continuation
of tobacco use, and the development of tobacco use disorder, with a degree of
heritability equivalent to that observed with other substance use disorders (i.e.,
about 50%).
• Some of this risk is specific to tobacco, and some is common with the vulnerability
to developing any substance use disorder.

CLINICAL FEATURES
Stimulatory effects of nicotine
Improved (attention, learning, reaction time, and
problem-solving ability)
lifts mood, decreases tension, and lessens
depressive feelings.
Short-term nicotine exposure increases CBF
without changing cerebral oxygen metabolism,
Long-term nicotine exposure decreases CBF.
contrast to its stimulatory CNS effects
Nicotine acts as a skeletal muscle relaxant.

DIAGNOSIS
Tobacco Use Disorder
• The DSM-5 includes a diagnosis for tobacco use disorder characterized
by
craving, persistent and recurrent use, tolerance, and withdrawal.
( impaired control, social impairment, risky use, and pharmacological)
• Dependence on tobacco develops quickly
because :
- nicotine activates the VTA dopaminergic system, the same system
affected by cocaine and amphetamine.
-The development of dependence is enhanced by substantial social
factors that encourage smoking in some settings and by the powerful
effects of tobacco company advertising.
-Persons are likely to smoke if their parents or siblings smoke and serve as
role models.
-Genetic diathesis toward tobacco dependence have been suggested.
- Most smokers want to quit and have tried many time but have been unsuccessfully.

Tobacco Withdrawal
• in DSM-5 no diagnostic category for tobacco intoxication,
but a diagnostic category for nicotine withdrawal.
Withdrawal symptoms
• can develop within 2 hours of smoking the last cigarette;
• they generally peak in the first 24 to 48 hours and can last
for weeks or months.
• The common symptoms include an intense craving for
tobacco, tension, irritability, difficulty concentrating,
drowsiness and paradoxical trouble sleeping, decreased
heart rate and blood pressure, increased appetite and
weight gain, decreased motor performance, and increased
muscle tension.
• A mild syndrome of tobacco withdrawal can appear when
a smoker switches from regular to low-nicotine cigarettes.

TREATMENT
• For those who already smoke, psychiatrists should advise them to quit
smoking. For patients who are ready to stop smoking, it is best to set a
“quit date.”
• Most clinicians and smokers prefer abrupt cessation, but because no
good quality data indicate that abrupt cessation is better than gradual
cessation, patient preference for gradual cessation should be
respected.
• Brief advice should focus on the need for medication or group therapy,
weight gain concerns, high-risk situations, making cigarettes
unavailable, and so forth.
• Because relapse is often rapid, the first follow-up phone call or visit
should be 2 to 3 days after the quit date.
• These strategies may double self-initiated quit rates

‘’The 5 A’s” for helping tobacco
cessation that uses a motivational interviewing
approach.

Psychosocial Therapies
• Behavior therapy is the most widely accepted and well-
proved psychological therapy for smoking.
• Skills training and relapse prevention identify high-risk
situations and plan and practice behavioral or cognitive
coping skills for those situations in which smoking occurs.
• Stimulus control involves eliminating cues for smoking in
the environment.
• Aversive therapy has smokers smoke repeatedly and rapidly
to the point of nausea, which associates smoking with
unpleasant, rather than pleasant, sensations.
• Aversive therapy appears to be effective but requires a
good therapeutic alliance and patient compliance

Hypnosis.
• Some patients benefit from a series of hypnotic
sessions.
• The hypnotist gives suggestions about the
benefits of not smoking, which the patient
assimilates into their cognitive framework.
• The clinician can also use posthypnotic
suggestions that cause cigarettes to taste
unpleasant or to produce nausea.

Psychopharmacological Thérapies

Nicotine Replacement Therapies
• All nicotine replacement therapies double cessation rates,
(reduce nicotine withdrawal).
• Hospitals may use these therapies on the wards to reduce
withdrawal.
• Replacement therapies use a short period of maintenance of
6 to 12 weeks, often followed by a gradual reduction period of
another 6 to 12 weeks.
• Eg: Nicotine polacrilex gum , Nicotine lozenges

…
Nicotine polacrilex gum
• is an OTC product that releases nicotine via chewing and
buccal absorption.
• ( A 2 mg variety for those who smoke fewer than 25 cigarettes a day
and a 4 mg variety for those who smoke more than 25 cigarettes a
day are available).
• Smokers are to use one to two pieces of gum per hour up to a
maximum of 24 pieces per day after abrupt cessation.

…
• Venous blood concentrations from the gum
are one-third to one-half between-cigarette
levels.
• Acidic beverages (coffee, tea, soda, and juice)
should not be used before, during, or after
gum use because they decrease absorption.
• Compliance with the gum has often been a
problem.

…
• Adverse effects are minor and include
unpleasant taste and sore jaws.
• About 20 percent of those who quit take the
gum for long periods, but 2 percent use it for
longer than a year; long-term use does not
appear to be harmful.
• The significant advantage of nicotine gum is its
ability to provide relief in high risk situations.

…
Nicotine lozenges
• Deliver nicotine and are also available in 2- and 4-mg
forms;
• They are useful, especially for patients who smoke a
cigarette immediately on awakening.
• Generally, 9 to 20 lozenges a day are used during the
first 6 weeks, with a decrease in dosage after that.
• offer the highest level of nicotine of all nicotine
replacement products.
• Users must suck the lozenge until dissolved and not
swallow it.
• Side effects include insomnia, nausea, heartburn,
headache, and hiccups.

…
• Nicotine patches also sold over the counter, are
available in a 16-hour, not a per preparation and a
24- or 16-hour tapering preparation.
• Patches are administered each morning and
produce blood concentrations about half those of
smoking.
• Compliance is high, and the only significant adverse
effects are rashes and, with 24-hour wear, insomnia.
Using gum and patches in high-risk situations
increases quit rates by another 5 to 10 percent.

…
• After 6 to 12 weeks, patients should discontinue
the patch.
• Nicotine nasal spray, available only by prescription,
produces nicotine concentrations in the blood that
are more similar to those from smoking a cigarette,
and it appears to be especially helpful for heavily
dependent smokers.
• The spray, however, causes rhinitis, watering eyes,
and coughing in more than 70 percent of patients

…
• The nicotine inhaler, also available only by prescription,
was designed to deliver nicotine to the lungs, but the
nicotine is absorbed in the upper throat.
• It delivers 4 mg per cartridge, and resultant nicotine
levels are low.
• The primary asset of the inhaler is that it provides a
behavioral substitute for smoking.
• The inhaler doubles quit rates.
• These devices require frequent puffing about 20
minutes to extract 4 mg of nicotine and have minor
adverse effects

…
Non-Nicotine Medications
• Non-nicotine therapy may help smokers who object
philosophically to the notion of replacement therapy
and smokers who fail replacement therapy.
Bupropion
• is an antidepressant medication that has both
dopaminergic and adrenergic actions.
• Bupropion SR started at 150mg/day for 3 days and
increased to 150 mg twice a day for 6 to 12 weeks.
• Daily dosages of 300 mg double quit rates in smokers
with and without a history of depression.
• Combined bupropion and nicotine patch had higher
quit rates than either alone.

…
• Adverse effects include insomnia and nausea, but these are
rarely significant.
• Contraindications to use of bupropion include a seizure
disorder (the risk of seizures in those appropriately
screened is less than 1 in 1,000), current/past bulimia or
anorexia nervosa, rennet/concurrent MAOI, or other
bupropion use.
• Though bupropion at one point carried a black box warning
regarding neuropsychiatric adverse events during smoking
cessation, the FDA has since removed this warning.
• This medication can be started 1 to 2 weeks before a quit
date and used for up to 6 months post quit.
• Of interest, another antidepressant, nortriptyline, appears
to be useful for smoking cessation as well.

…
Varenicline
• Is a partial agonist at the α4β2 neuronal nicotinic acetylcholine
receptor; It both relieves craving and withdrawall,
• unlike other medications, reduces the reinforcing effects of nicotine
by blocking dopaminergic stimulation responsible for smoking
reinforcement/reward.
• While there were concerns about the FDA-issued black box
warnings for neuropsychiatric adverse events (depressed mood,
agitation, changes in behavior, suicidal ideation, and suicide)
• More recent research of varenicline in psychiatric patients has
found that psychiatric symptoms do not worsen nor does the risk of
suicide increase.

…
• The FDA has removed the black box warning
associated with neuropsychiatric adverse
events from varenicline.
• potential cardiovascular adverse events
“a small, increased risk of certain
cardiovascular adverse events in people who
have a cardiovascular disease”.
• Clinicians should counsel patients on these
risks and monitor for symptoms related to
mental status and cardiac status.

Combined Psychosocial and
Pharmacologic Therapy
• combining nicotine replacement and behavior
therapy increases quit rates over either
therapy alone.
(Several studies have shown that )

Health Benefits of Smoking Cessation
• Smoking cessation has significant and immediate health benefits for
persons of all ages and provides benefits for persons with and
without smoking related diseases.
• Former smokers live longer than those who continue to smoke.
• Smoking cessation decreases the risk of lung cancer and other
cancers, myocardial infarction, cerebrovascular diseases, and
chronic lung diseases.
• Women who stop smoking before pregnancy or during the first 3 to
4 months of pregnancy reduce their risk of having low–birth-weight
infants to that of women who never smoked.
• The health benefits of smoking cessation substantially exceed any
risks from the average 5-lb (2.3-kg) weight gain or any adverse
psychological effects after quitting.

References
• Nturibi, E. M., Kolawole, A. A., & McCurdy, S. A.
(2009). Smoking prevalence and tobacco control
measures in Kenya, Uganda, the Gambia and
Liberia: a review. The International Journal of
Tuberculosis and Lung Disease, 13(2), 165-170
• Kaplan Sadock’s Synopsis of Psychiatry by Robert
Boland, Marcia Verdiun, Pedro Ruiz (z-lib.org)
• American Psychiatric Association: Diagnostic and
Statistical Manual of Mental Disorders,
Fifth Edition, Text Revision. Washington, DC,
American Psychiatric Association, 2022

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