Title: New and Old Medications for the Treatment of Substance Dependence
1New and Old Medications for the Treatment of
Substance Dependence
- Barry Zevin MD
- Tom Waddell Health Center San Francisco
Department of Public Health - Harm Reduction Therapy Center, San Francisco, CA
- Barry_Zevin_at_sfdph.org
2Ways of Understanding Addiction
- Crazy, Lazy, and Bad - Moral model
- Tail of the bell curve - Statistical model
- Youve got issues - Psychological model
- Self Treatment - Psychiatric model (Self
treatment of psychiatric disorder) - In the wrong place at the wrong time with the
wrong people - Social model - Its a disease - Medical model
- Its an emptiness that you need to fill up -
Spiritual model
3Bio-Psycho-Social-Spiritual model
- Biological phenomenon underlie all aspects of
addiction and addictive behavior - Psychological, Social, and Spiritual issues are
all facets of the illness of addiction - The moral model is still the prevalent way of
understanding addiction - This understanding is damaging to patients,
families, and society - Better understanding of the neurobiological basis
of addiction can help reverse this
4Evidence for Addiction as a neurobiological
phenomenon
- Strong genetic predisposition
- Excellent evidence from animal studies
- Brain changes visible on imaging, functional
imaging, and pathological exam - Addiction is a chronic relapsing disorder very
similar to well accepted diseases such as
hypertension, diabetes, or asthma
5Important neuro-biology concepts
- Reward systems - dopamine
- Homeostasis
- Neuro-Inhibition / neuro-excitation - GABA -
glutamate system - Multiple brain systems involved - opioid,
cannabinoid, nicotinic acetylcholine , others - Physical dependence / withdrawal / reward
deficiency - Craving / relapse re-exposure to drugs (cross
triggering), cue induced, stress induced
6Important neuro-biology concepts
- Neuroplasticity
- Vulnerabilities to addiction
- Inherited, acquiredmixed
- Genetic connection established
- Very few instances in which actual genetic
changes have been identified - Co-occurring disorders very common
- Set and setting very important
- Spiritual components critical
7Reward circuits
- Addictive drugs directly or indirectly work
through reward circuits - Activity in reward circuits over-stimulated and
therefore natural activity reduced (possibly
permanently damaged) - Reward circuits are stimulated not only by actual
exposure to drug but by cues, stress, exposure to
other drugs - This is part of natural functioning of system
8(No Transcript)
9Craving and Loss of Control
- Dopamine reward systems are the primary
motivating system in the brain - Medication interventions based primarily in the
dopamine system not effective
10Craving and Loss of Control
- Drug craving glutamate system and
norepinephrine cause dopamine release in
anticipation of remembered conditioned reward
primes the pump and triggers all the compulsive
behaviors and motor memory in anticipation of
further dopamine release - Endorphin, Endocannabinoid, Gaba, etc. systems
all have complex interconnections acting on this
phenomenon
11Craving and Loss of Control
- Real problem in addiction medicine is relapse
- Effective medication treatments for addiction
depend on understanding and changing the complex
neurobiological systems related to craving and
loss of control
12Case 1 Alcohol
13Mr. Stevens
- Mr. Stevens
- 45 yo homeless man with long history of drinking
with consequences including falls with fractures,
incarceration for offenses including indecent
exposure (resulting in being listed as a sex
offender), violent and abusive episodes resulting
in his being 86d from many clinics and sites,
suicidality requiring involuntary holds. - He has had multiple treatment episodes usually
beginning with inpatient detoxification. He is an
enthusiastic AA participant when sober but
usually relapses in 3-6 months often with severe
consequences - Triggers for relapse include relationships,
attempting to work, being discouraged by mess
Ive made of my life, walking by liquor store,
seeing others drink, etc.
14Case 1 Mr Stevens
- Obnoxious, abusive and violent when drinking
- Anxious, guilty, dependent when not drinking
- Interventions
- BZD Rx resulting in early alcohol relapse, SSRI
described as helpful but not adherent after early
relapse - 18 mo ago started naltrexone 50mg PO, citalopram
added - Initially maintained 6 mo abstinence in dry bed
in HL shelter then given opportunity for
residential dual diagnosis program or SRO based
minimally supportive housing - chose housing,
relapsed, eviction due to out of control behavior
after 4 months
15Case 1 Mr Stevens
- Returned to clinic 1 month after eviction with 1
week clean and sober staying in HL shelter.
Restarted Naltrexone and entered residential
program when available. Now struggling with
program ending and continued homelessness - 15 months not drinking in the last 18 months is
by far longest period of abstinence for patient
since adolescence. Despite exposure to usual
triggers for relapse has been better able to cope
with craving - Anxiety, personality style, multiple losses and
traumas, major barrier of sex offender
registration are still problems
16Treatment
- Research shows that some medications may be
helpful - Decreasing craving
- Decreasing amount of drinking in individual
episodes and over the course of time - Help maintain abstinence
- All medications may work best combined with
psycho-social-spiritual modalities
17Best Practices for Alcohol Dependence
- Diagnose and treat underlying mental health
disorders - Evidence for efficacy in treatment of virtually
all MH disorders is superior to any modalities
for alcohol dependence - Symptoms caused by direct effect of alcohol
should improve within 1-2 weeks
18Best Practices for Alcohol Dependence
- Diagnose and treat underlying mental health
disorders (cont.) - Depression/anxiety/bipolar disorder/personality
disorders commonly co-occur - Use principles of harm reduction psychotherapy
- Use meds with consideration of safety when used
with alcohol - Most meds are safe even if drinking
resumes/continues - Caution with BZDs due to synergistic risk of
oversedation - Caution with hepato-toxic meds in patients with
alcoholic hepatitis
19Promising Target Mechanisms for Alcoholism
Treatment
- Prevent brain damage from repeated episodes of
withdrawal (excito-toxicity) - Prevent priming effect of small amounts of
alcohol from triggering full blown relapse - Prevent conditioned alcohol related stimuli
(cues, environmental context from triggering
relapse) - Prevent stress and negative affect from
triggering relapse - Reduce impulsivity
20Goals of Medication treatment for Alcoholism
- Prevent adverse effects of withdrawal
- DTs, seizures, severe anxiety and dysphoria
- Excito-toxicity and cognitive damage
- Early exit from treatment
- Abstinence maintenance / Relapse prevention
- Moderation / Prevention of loss of control
21Alcohol Medication Treatment
- Withdrawal-BZD preferred
- Adjunctive medications for symptom control
- Added meds especially when co-occurring disorders
- Use symptom triggered dosing protocol when
possible (use CIWA scores) - Fixed protocols more practical and successful for
outpatient (or poorly staffed/poorly trained
residential or hospital) detox
22Alcohol Medication Treatment FDA approved for
treatment of alcoholism
- Naltrexone
- opioid receptor antagonist, blocks
reward/reinforcement from drinking Blocks
anticipatory reward from triggers/cues - Best evidence so far - Shown to statistically
reduce drinking days, volume of drinks, increase
time to first drink and abstinent days compared
to placebo - Start as early as possible after initiation of
abstinence - 50mg once daily by mouth
- 1/4 great effect, 1/2 works somewhat, 1/4 no
effect (anectdotal)
23Alcohol Medication treatment
- Naltrexone
- Compliance a problem dysphorogenic
- Cannot use in patients requiring opioid
medication for chronic pain or Methadone/Bupe pts - Injectable long acting form not available to poor
people due to drug company marketing strategy - If patients need acute pain control (car crash or
emergency surgery need special attention to
overcome opioid receptor blockade)
24Alcohol Medication Treatment
- Disulfiram (antabuse)
- Alcohol use results in build up of acetaldehyde,
causing unpleasant nausea, vomiting, flushing and
headache - Works best if given under supervision with strong
social support to take it everyday - Possible positive effects on cocaine addiction
may make this a good choice for combined alcohol
/ cocaine - Need to be alcohol free for 72 hours
- 250mg by mouth once daily
- Check liver enzymes during therapy
25Alcohol Medication treatment
- Acamprosate
- indirectly blocks glutamate effect at NMDA
receptor, offsetting GABA/glutamate system
imbalance - Reduces chronic withdrawal symptoms, and
reduces cue related relapses - Good safety profile, well tolerated
- Two 333mg tablets three times daily by mouth
- Disappointing results in recent large American
trials compared to naltrexone alone and placebo - Worth a try especially in patients with no effect
with naltrexone or who have contraindications - May work better in patients with longer periods
of continuing abstinence
26Alcohol Medication Treatment FDA approved for
indications other than alcoholism
- Topiramate
- anticonvulsant, stimulates GABA b receptor in
reward circuit and reduces dopamine release with
alcohol use, limiting reward - Also offsets GABA/glutamate system imbalance and
reduces chronic withdrawal symptoms - Reduces drinking days, drinks per day, increases
time to first drink and abstinent days - 25mg to 300mg daily need to increase dose slowly
to avoid cognitive dysfunction - initial dosing
while drinking ok - Not too easy a drug to use, expensive
- Worth considering especially for patients with
co-occurring migraines, seizures, bipolar, morbid
obesity, neuropathic or other pain syndromes
27Alcohol Medication Treatment
- FDA approved for indications other than
alcoholism - Valproate (Depakote), Levaricetam (Keppra) other
AEDs may be worth trials in special
circumstances - Baclofen
- Also promising in cocaine and other addictions
- Prazosin and other alpha blockers
- Also used for PTSD related nightmares / sleep
disorders - Ondensetron
- In trials was effective in early onset
alcoholics/high heritability - Other serotonin active meds may not be effective
28Alcohol Medication Treatment
- What about Benzodiazepines?
- Risk of overdose
- Risk of triggering drinking in abstinent patients
- Can be life changing in selected patients with
severe underlying anxiety not responsive to other
meds. - alcohol maintenance strategies
- Positive outcomes in research done in Canada with
severe alcoholics with this approach
29Best Practices for Alcohol Dependence
- Role of AA / 12 step facilitation
- AA is a spiritual program not a medical
intervention - Recommendations to go to AA may be reasonable
but do not constitute medical care - 12 step facilitation is an accepted medical
intervention - Research shows it to be equally as good/bad as
other interventions - MATCH Study
- Medication treatment for alcoholism and AA are
not in conflict - See brochure The A.A. Member - Medications
Other Drugs and p. 133 the Big Book
30Tobacco
- Most alcohol and drug users will get sick and die
of tobacco related illnesses - Classic harm reduction situation in which the
active drug, nicotine, is not responsible for the
harms attributable to the substance - Smoking cessation should be a very high priority
- Quitting while still using is possible
- Smoking cessation counseling may be strong signal
that you have hope and caring for a patient - Quitting is possible and desirable even for
people with severe co-occurring addictions and/or
severe mental health disorders - Quitting cigarettes may be highly motivating
- Moderation and reducing use may be helpful
- Residential programs that prohibited smoking and
offered smoking cessation treatment had better
results for smoking cessation and alcohol and
drug related outcomes
31Tobacco
- There are excellent medical treatments to help
with smoking cessation available - All treatments work best combined with
psycho-social techniques - Quitting is possible and desirable even for
people with severe co-occurring addictions and/or
severe mental health disorders
32Pharmacotherapy Nicotine
- Very difficult addiction to manage up to 75 of
smokers want to quit, 33 try to quit each year,
3-5 succeed - One pack per day smoker gets 200 doses of
nicotine per day pairing of drug use to multiple
daily life events - Unique ability to modulate wide variety of moods
- Oral gratification
- Causes weight loss
- Any type of pharmacotherapy doubles rate of
success
33Pharmacotherapy Nicotine
- Nicotine replacement therapy low tonic dose of
nicotine increases number of nicotinic
acetylcholine receptors in desensitized state
reduces withdrawal symptoms - Number of receptors slowly decreases over weeks
34Pharmacotherapy Nicotine
- Nicotine replacement must be given at high enough
dose - Patients with chronic schizophrenia appear to
have a positive effect of nicotine on associated
cognitive declines - Consider indefinite nicotine replacement in these
patients - This may be true for many smokers and paradigm is
changing toward long term / indefinite nicotine
replacement
35Pharmacotherapy Nicotine
- Nicotine gum 2-4mg chew then park allows
self-titration to symptoms 10-15 pieces per day - Ineffective use (continuous chewing) often a
problem - mouth irritation / poor dentition may limit use
- Nicotine patch
- 7-21mg change every 24 hours
- 1PPD often require more than one patch - under
dosing is main cause for failure - consider dose taper no sooner than four weeks
long term use is acceptable - if sleep disturbance can remove at bedtime
- adhesive irritation may limit use
- Nicotine nasal spray or inhaler (ok to combine
with patch) - Safe even in patients with coronary artery disease
36Pharmacotherapy Bupropion
- Bupropion monocyclic antidepressant, inhibits
reuptake of dopamine and norepinephrine does not
work by its anti-depressant effect - Antagonizes nicotinic acetylcholine receptors and
decreases reward of smoking - Additive effect with nicotine replacement therapy
- Minimizes weight gain
- 150 mg by mouth daily for three days, then twice
daily - Cannot be used in patients with history of
seizures - May be useful in stimulant abuse - aim to quit
cigs and coke or speed
37Pharmacotherapy Verenicline
- Chantix (varenicline) partial agonist at
nicotinic acetylcholine receptor occupies
receptor and reduces/eliminates reward of smoking
while reducing withdrawal symptoms - .5mg daily for three days, then .5mg twice daily
for five days, then 1mg twice daily starter kit
available - Better than bupropion and/or nicotine replacement
therapy - Major side effects are nausea, headache and
insomnia - Can be used in combination with most other meds
- Concerns about mood changes and suicidality
- Careful monitoring for depression / suicidality
throughout treatment course (this is a good idea
for everyone making a quit attempt)
38Case 2 Opioid Dependence
39Miss Daniels
- 30 yo homeless woman with hx of childhood trauma,
MDD, GAD, chronic pain, Hep C, and heroin
dependence - Started using IV heroin in adolescence, now uses
1-2 gms daily - Presented with desire to stop using, had multiple
attempts but not able to maintain abstinence.
Tried methadone detox in past. Cited addiction to
the ritual of using and being in pain as reasons
for not being able to stop - Never received tx for depression and anxiety in
past - Difficult to form relationship with providers due
to trust issues
40Case 2 Ms. Daniels Progression of Treatment
- Developed relationship over time. Sporadic visits
eventually became weekly visits - Slowly introduced other tx providers
- Tried various antidepressants/antianxiety/mood
stabilizer medications (Paxil, Wellbutrin,
Effexor, Klonopin, Celexa, Lamictal) - Referred to methadone maintenance program,
advocated for free slot until medical benefits
approved - Stabilized on methadone but increased crack and
BZD use due to high level of access and triggers
at methadone clinic - Currently chips when excessively bored or
stressed, ritual of use still powerful trigger
41Case 2 Ms. Daniels Progression of Treatment
- Assisted her in obtaining a companion pet (cat)
- Current medication regimen Seroquel 100mg bid,
Remeron 15mg qhs, Trileptal 300mg bid - Stabilized in traditional methadone clinic and
now transferred to OBOT (office based opioid
treatment) model combining primary care and
addiction treatment - daily dosing at pharmacy has resulted in much
less other drug use - Goals of reconnecting to family, getting
extensive dental work done are completed.
Orthopaedic follow-up to address sequelae of
multiple old traumas pending, hep C treatment
still on the back burner
42Opioid use Disorders - Natural History
- High mortality rate
- Is there a difference between heroin addiction
and Rx opioid dependence? - Rate of long term abstinence without methadone or
Buprenorphine maintenance lt 10-20 - Due to congenital condition, or something caused
by drug exposure, natural opiate receptors may be
permanently malfunctioning - Without methadone or Buprenorphine replacement
relapse to opioid abuse occurs in 80 no matter
what other kinds of treatment are done - To feel normal most people with opioid
dependence probably need some constant opioid
activity on the receptor - Buprenorphine (and probably methadone) have a
potent effect on the psychological aspect of
addiction. Thinking about getting high, dreams,
craving
43Pharmacotherapy Opiates
- Endogenous opiate pathways chronically (?
permanently) altered - Dysphoria, chronic withdrawal symptoms, craving
- Repeated use of short acting opiates alternating
with episodes of withdrawal drives increased
tolerance and dysfunction of system - Chronic use of opiate agonists at a steady level
regulate this dysfunction back to normal
44Detox?
- One year recovery rates after opiate detox
- drug free 5-30
- Naltrexone 10-20
- Opioid agonist therapy 50-80
- Mortality much lower in currently treating
methadone or buprenorphine maintenance then in
waiting list or dropped out of treatment - Be realistic and think critically of any detox
based approach - Respect patient choices
- Consider harms and benefits
45Pharmacotherapy Opiates
- Naltrexone mu receptor antagonist blocks
rewarding effect of opiate use - Must be drug free for 1-7 days or precipitate
withdrawal - Dysphorogenic early drop out a problem depot
form available - Opiate analgesics for pain control inhibited
- Efficacy in highly motivated patient with very
strong social support - Usually ineffective and theory of blocking opiate
high eventually resulting in extinguishing
craving is probably wrong - More effective for alcohol dependence, negative
results for cocaine but 1 positive study for
methamphetamine
46Pharmacotherapy Opiates
- Mu receptor agonists methadone and buprenorphine
- Significantly reduce rate of mortality, IV drug
use, crime, HIV infection, relapse increase rate
of employment, health parameters and social
function
47Pharmacotherapy Methadone
- long acting, once a day supervised/unsupervised
dosing low abuse potential - Dose titrated to reduce or eliminate withdrawal
symptoms, craving restore physiologic functions
toward normal - Prolongs QT interval and risk for fatal cardiac
arrhythmia in some patients - Role of screening and follow up EKG causing
controversy
48Pharmacotherapy Methadone
- Minimal sedation constipation decreases libido
- Risk of sedation low when used at appropriate
dose and not in combination with other meds - Danger of overdose in poly-drug use combinations
with other sedating meds or drugs - In USA legally only for use in treatment of
opioid dependence in stringently regulated
narcotic treatment programs - Extensive street mythology may discourage use -
No effect on bones or teeth, not worse withdrawal
then other opioids (longer though), not really an
effective opioid blocker, enviable long term
safety record for methadone and opioids in
general.
49Pharmacotherapy Buprenorphine
- Approved in 2002 can be administered in office
setting by qualified physician no more than 30
patients (up to 100 with request) - Partial mu receptor agonist, will precipitate
withdrawal syndrome in heroin or methadone users
drug free 12-72 hours before starting depending
on opioid abused - Combined with naloxone to prevent IV use bitter
taste of naloxone inhibits multiple dosing - Equally effective as moderate doses of methadone
(60mg/day) may not be as effective as higher
doses of methadone (80mg/day) in patient with
high tolerance - This may be more related to difficulty of
induction in these patients than tolerance levels
50Buprenorphine
- Generally safer in terms of overdose risk than
other opioids - Partial agonist/ceiling effect
- Overdoses that have occurred have been when used
together with Benzodiazepines - Level of risk still not clear
- Pharmacokinetic vs pharmacodynamic vs other
- Overdoses in abuse settings usually with IV BZD
and / or IV buprenorphine use - Thought to be safe in setting of prescribed BZD
use without abuse - With careful monitoring
- Counsel and educate all patients about risk of OD
with BZD
51Buprenorphine and Benzodiazepine issues
- Work with patient to understand their pattern of
BZD use - Often used as 2nd best choice when preferred
opioid is not readily available - Often used to come down from cocaine or speed run
- Sometimes used for self treatment of underlying
anxiety disorder or intolerable trauma issues - Less commonly used to Just get high or snowed
- Danger of overdose with illicit opioid and BZD
definitely higher than with Bupe and BZD - Danger of OD probably higher with methadone and
BZD than Bupe and BZD - Liability concerns (which are not trivial)
underlie much of the discussion
52Overdose Prevention
- Education beneficial in preventing overdose
- Naloxone training when widely offered in
community saves lives - Rescue breathing, naloxone kit dispensed,
mechanism to replace when used - Opioid users frequently exist in tight knit
urban ecosystems and therefore training must be
focused on active users or those likely to become
active users - Treatment programs are excellent settings to
offer this service - Most users will return to using or at least to
spending time with using community
53 Case 3 Stimulant Use Disorders
methamphetamine/cocaine
54Case 3 Mr. Player
- 40 yo homeless man with history of post traumatic
arthritis, psychosis diagnosed as paranoid
schizophrenia, crack cocaine use - Previous medical provider cut him off
prescriptions for tylenol 3 due to poor
adherence to appointments, urine toxicology
showing cocaine but no codeine, frequent criminal
justice problems - Patient agreed to enter outpatient dual diagnosis
treatment as condition to consider restarting
opioid analgesic for pain. Baclofen was
prescribed as an adjunct for both muscle spasm
and cocaine dependence
55Mr. Player Current Clinical Picture
- Patient has demonstrated
- much reduced psychotic symptoms, better clinic
appointment adherence - no further incarcerations
- only 1 positive urine toxicology in past year (he
has requested that these be done as a help to his
treatment) - his pain and functioning are much improved on a
moderate monthly dose of vicodin - Patient attributes much of improvement to
baclofen - He continues with difficult behavior in the
clinic especially with female staff
56Cocaine / Use Disorders - Natural History
- Genetic predisposition
- Method of delivery of drug very addictive
- Typical pattern of use - binge (run), crash,
craving, long term persistence of intense craving
brought on by triggers - Theory of kindling- like a seizure
- Not everyone uses in typical patterns
- No proven medications but possibly some things to
try - Numerous medications studied and failed
- Baclofen, disulfiram, bupropion, several
stimulant like drugs, atypical anti-psychotics,
and AEDs with early promising data - Esp. if co-occurring medical or psychiatric
conditions
57Methamphetamine
- Chronic methamphetamine use often has severe and
long term consequences on brain functioning - Recognize long lasting / frequently recurring
psychosis as a risk of methamphetamine use - Good evidence for a genetic vulnerability to this
adverse effect - Recurrence may be caused by small doses or
stressful events - Push and crash phenomenon is common so using to
counteract fatigue is a bad idea - No proven medications but possibly some things to
try - Wellbutrin or other non SSRI antidepressants
- Stimulant or stimulant like meds being researched
- Underlying ADHD may be common but is hard to
diagnose and treat while patients are still using - Treating agitation and psychosis while using -
BZD may be safest. Treating lingering psychosis
with anti-psychotic medications may be helpful
58Pharmacotherapy Cocaine/Amphetamines
- Multiple medication trials ssris, tricyclic
antidepressants, mao inhibitors, naltrexone,
campral, anticonvulsants none better than
placebo - Baclofen, disufiram, bupropion,
psycho-stimulants, atypical anti-psychotics,
naltrexone, others promising in small trials but
so were the other meds that failed in larger
trials - Intense psychosocial treatment
- ? Immunotherapy vaccination producing antibodies
against drug, prevents it from reaching reward
center
59ADHD and stimulant use (and other drug use)
- Co-occurring substance use disorders now known to
be frequent in ADHD - Early and continued psycho-stimulant treatment
reduces substance use disorders - In patients with convincing clinical history and
presentation trial of treatment with
psycho-stimulant or non stimulant Rx may be
warranted - Anecdotally in my patients abuse / diversion has
not occurred possibly due to high access to
cocaine and methamphetamine
60Marijuana
- The brain and body have an extensive
endo-cannibinoid system (10X more extensive than
endorphin system) - There is a typical withdrawal syndrome from heavy
marijuana use - There is legitimate concerns re long term brain
effects - Increased risk of schizophrenia in small number
of early users - Increase in psychotic symptoms in users with
underlying psychotoc disorders - Brain cortex changes in long time heavy users
- Medical marijuana use has extensive pros and cons
and these should be discussed - Cannibinoid system primarily used for novelty and
saliency (making things interesting) - Possible drawbacks of virtual novelty
- Medications that block cannibinoid receptors are
likely to have a lot of side effects - Main proven harm of MJ use remains risk of
involvement in criminal justice system
61(No Transcript)
62Marijuana for Harm reduction
- Can marijuana work as harm reduction for alcohol
/ other drugs - Research is lacking in this area
- Individualize decision making
- Alcoholic with severe cirrhosis MJ is greatly
preferable to alcohol - MJ in pt with schizophrenia and crack dependence
maybe not (esp. if pt is already obese)
63Thank you to Esker-D Ligon NPPsychiatric Nurse
PractitionerHarm Reduction Therapy
CenterClinical facultyUCSF School of Nursing
- For valuable contributions to an earlier version
of this presentation
64Thank You to All My Colleagues at Tom Waddell
Health Center and Our Many PartnersThank You to
My Patients Who I Learn From Every Day