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Substance Abuse in the Elderly – An Overview
Timothy P. Condon, Ph.D.Deputy Director,
National Institute on Drug Abuse National Institutes of Health
Department of Health and Human Services
Drug Abuse in the 21st Century - What Problems Lie Ahead for the Baby Boomers?Bethesda, Maryland
Thursday, September 16, 2004
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What do we know?
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0
5
10
15
20
25
30
35
40 "Gen X & Y"
"Baby Boomers"
"Greatest Generation"
Past Year Illicit Drug Use, by Age: 2002
Source: 2002 National Survey on Drug Use & Health (SAMHSA)
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What do we anticipate seeing from the aging baby boomer generation?
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What is a Baby Boomer?
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What is a Baby Boomer?
• Those born between (and including) 1946 and 1964 (40-58 yrs old)
• Currently represent 29% of the U.S. population
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3.1 4.99
16.7
25.731.2 35
40.2
54.6
71.5
0
10
20
30
40
50
60
70
80
num
ber
in m
illi
ons
1900 1920 1940 1960 1980 1990 2000 2010 2020 2030
Year (as of July 1)
Number of Persons 65+, 1900-2030
Source: A Profile of Older Americans: 2003, Administration on Aging, HHS
Changing Demographics: More ElderlyChanging Demographics: More Elderly
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Estimated Cost of the Consequences of Substance Abuse Among Mature Women in
1998 - $22.3 Billion*
• Inpatient Hospital Charges ($10.1 Billion)
– Medicare - $8.5 Billion
– Medicaid - $338 Million
– Private insurers/individuals - $1.3 Billion
• Nursing Home Expenses ($12.2 Billion)
– Medicare - $1.4 Billion
– Medicaid - $5.8 Billion
– Private insurers/individuals - $5 Billion
Only 2% was spent to treat the substance abuse problem itself.
*Does not include outpatient hospital visits, physician office visits and home health care.
Source: CASA, Under the Rug: Substance Abuse and The Mature Woman, June 1998.
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What are the cultural/societal factors that may impact differences in drug use and abuse in this generation as
compared to the previous generation?
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Birth cohorts that experience high rates of illicit drug use in youth or
young adulthood have subsequently shown higher rates of use as they age,
relative to other cohorts.
Source: The NHSDA Report, Substance Use Among Older Adults; Nov 2001
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What are some of the behavioral and sociological factors?
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Americans are Living Longer
8481
7775.473.770.869.768.2
47.34045505560657075808590
1900 1950 1960 1970 1980 1990 2000 2025* 2050*
Year of Birth
Lif
e E
xpec
tanc
y at
Bir
th
*Projected
Sources: US Census Bureau and Centers for Disease Control and Prevention
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Sex, Drugs & Rock ‘N Roll
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Disposable Income
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Fewer Family Responsibilities
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Americans Are Living Better?
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Mid-Life Crises – Distress Over Getting Older
• “50 is the new 30”
• Physical impairments
• Losses
• Kids leaving house
• Decreased physical prowess
• Retirement
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“Quick Fix” Society
• More Treatment Options Available
• Increased Availability of Medications
• Less Stigma Associated
• Advertising
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Source: IMS Health and Competitive Media Reporting, Inc
Just a Click Away - Drug Advertising is Ubiquitous
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30% of Americans talked to their doctor about medicine they saw
advertised.
Of these, 44% received the prescription drug they asked about
Source: Kaiser Family Foundation Understanding the Effects of Direct-to-Consumer Prescription Drug Advertising, November 2001
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As Prescriptions Increase Emergency Room Visits For Non-Medical Abuse
Have Also Increased
Num
ber
of P
resc
ript
ions
(in
100
0s)
0
10000
20000
30000
40000
50000
60000
70000
80000
1994
1995
1996
1997
1998
1999
2000
2001
Source: SAMHSA, DAWN, 2002
Hydrocodone
Oxycodone
prescriptions
prescriptions
0
6000
12000
18000
24000E
D M
enti ons
emergency
emergency
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Availability on the Internet Delivered in the Privacy of your Home
“Some reasons why you should
consider using this pharmacy”
No prescription required!
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Are There Biological Factors to Consider?
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How Does the Brain Change with Age?
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Brain Changes Across the Lifespan
Sowell et al, Nature Neuroscience v 6,3 p 309, 2003
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How Does Aging Affect the Pathways Associated with Substance Abuse?
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Dopamine Pathways
Functions•reward (motivation)•pleasure,euphoria•motor function (fine tuning)•compulsion•perseveration
Serotonin Pathways
Functions•mood•memory processing•sleep•cognition
nucleusaccumbens
hippocampus
striatum
frontalcortex
substantianigra/VTA
raphe
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Age-related reductions in D2 receptor binding in striatum
Source: Volkow, N.D. et al., Brookhaven National Laboratory.
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
10 20 30 40 50 60 70 80D
V(B
G)
/ D
V (
CB
)Age
r = 0.69, p < 0.0001(n = 25)
[11C]Raclopride24 years24 years
44 years44 years
86 years86 years
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Age-related decline in dopamine transporter binding
2.0
2.3
2.5
2.8
3.1
3.4
10 20 30 40 50 60 70 80
DV
(BG
) /
DV
(CB
)
Age
r = 0.70, p < 0.0002
[11C]d-Threo Methylphenidate24 years24 years
44 years44 years
86 years86 years
Source: Volkow, N.D. et al., Brookhaven National Laboratory.
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Age-related Decreases in Serotonin Transporter Binding
Source: Yamamoto M.. et al., Life Sciences, 71, pp. 751-757, July, 2002.
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Will age-related changes in brain Will age-related changes in brain function affect susceptibility to function affect susceptibility to reward or sensitivity to illicit reward or sensitivity to illicit
substances?substances?
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Age-related declines in cannabinoid receptor function in mice are linked to age-related
declines in alcohol preference
Source: Wang, Lei et al. (2003) Proc. Natl. Acad. Sci. USA 100, 1393-1398
Young Old
EtO
H I
nta
ke
(g/k
g/d
ay)
EtO
H P
refe
ren
ce
Can
nabi
noid
Ago
nist
Stim
ulat
ed
G-P
rote
in B
indi
ng
AmygdalaAmygdala
Old (26-48 weeks)
Young (6-10 weeks)
Limbic Limbic ForebrainForebrain
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How does aging affect susceptibility to the toxic effects of drugs of abuse?
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Modified from Miller et al., Annals of the New York Academy of Sciences 914 (1) 194, 2000
Age-related increases in methamphetamine-induced toxicity
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How does early exposure to drugs of abuse affect the aging process?
What are the potential consequences?
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Prolonged Drug Use ChangesProlonged Drug Use Changesthe Brain In Fundamentalthe Brain In Fundamentaland Long-Lasting Waysand Long-Lasting Ways
Science Has Generated A Lot ofEvidence Showing That…
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Dopamine D2 Receptors are Lower in Addiction
DA
D2
Rec
epto
r A
vaila
bili
tycontrol addicted
Cocaine
Heroin
Alcohol
DA
DA
DA
DA DA DA
DA
Reward Circuits
DA DA DA DA
DA
Reward Circuits
DA
DA
DA
DA DA
DA
Drug Abuser
Non-Drug Abuser
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Increased white matter lesions in cocaine dependent subjects with age
Source: Bartzokis, G. et al., American Journal of Neuroradiology, 20, pp. 1628-1635, October, 1999.
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Rats Exposed to Nicotine in AdolescenceSelf-Administer More Nicotine Than Rats
First Exposed as Adults
Sources: Collins et al, 2004, Levin et al, 2003, NIDA Notes v19.2
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Rats First Exposed to Nicotine in Adolescence Show Greater Rats First Exposed to Nicotine in Adolescence Show Greater Sensitization to Cocaine Than Rats First Exposed as AdultsSensitization to Cocaine Than Rats First Exposed as Adults
Sources: Collins et al, 2004, Levin et al, 2003, NIDA Notes v19.2
*Activity level after cocaine administration was measured by counting the number of times in 10 minutes each rat crossed light beams projected in a grid across its cage.
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Medical Consequences: Heart attacks Strokes
Cancer Psychiatric Disorders
Consumption becomes compulsive, despite negativesocial and health consequences
If in youth, drug addiction can cause serious medical complications…
What might be the effect in the elderly?
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Elderly persons use prescription medications approximately three times as frequently as the general population
Source: Patterson, et al. Psychiatric Times, April 1999.
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What are the consequences of drug interactions (e.g. between prescription
drugs and illicit drugs)?
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How does aging affect drug disposition/metabolism?
• Pharmacokinetics change with aging
– Reduction in renal drug elimination resulting in increased drug serum levels and the potential for adverse drug reactions.
– Volume of drug distribution decreases resulting in higher plasma concentrations.
• Pharmacodynamic effects with aging
– Neurotransmitter receptor properties may change with age.
– Reduction in homeostatic mechanisms resulting in more time required to regain steady-state following drug therapy
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What is the relationship between drug abuse and co-morbid conditions in the
elderly?
• Psychiatric disorders
• Neurological disorders
• Cardiovascular disease
• Cancer
• Kidney Disease
• Liver disease
• Musculoskeletal disorders
• HIV
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Some relevant issues in developing prevention, detection/diagnosis, and treatment programs for the elderly
• Age-related brain changes
• Changes in drug sensitivity
• Use of different drugs
• Side effects more severe/more of an issue
• Different access to the drugs
• Different settings (i.e. nursing homes)
• Age-specific screening instruments needed
• Stigma
• Need better education re. prescription drugs
• Data systems to track prescription use
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PHARMACOLOGICAL THERAPIES with a Strong Base of Scientific Evidence –
NOT TESTED ON ELDERLY
• METHADONE
• NALTREXONE
• BUPROPION
• NICOTINE REPLACEMENT THERAPY
• BUPRENORPHINE
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Future Research
• Research on animal models
• Expanding longitudinal epidemiological studies to examine drug abuse in the elderly
• Behavioral and sociological studies in aging populations and substance abuse.
• Developing age-specific prevention programs, screening tools, and treatments
• Brain imaging over life course
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