Marijuana, Compassionate Care Act and Review of …...Chemical substance that crosses the...
Transcript of Marijuana, Compassionate Care Act and Review of …...Chemical substance that crosses the...
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Marijuana, CompassionateCare Act and Review of Recent Drug Trends
Andrea G. Barthwell, MD, FASAMNovember 10, 2014
AITCOYSpringfield, Illinois
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DisclosuresNo conflict of interest with this contentPotential perception of conflict:
Collaborator: Caron FoundationConsultant: Alvee Laboratories, Braeburn Pharmaceuticals, Millennium LaboratoriesFounder: The Parents Academy (supported, in part, by Caron Foundation)Managing Partner: Treatment Partners LLC (Two Dreams Outer Banks)Medical Director: Encounter Medical Group, P.C.Partner: EMGlobal LLCFormer Consultant: GW Pharmaceuticals
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Objectives: Following this presentation the participant will be able to:
Discuss the physiological and psychological effects of marijuana on the bodyUse information to engage a young person in a discussion about common myths of marijuana useExpress common concerns and possible solutions the Compassionate Care Act may have on the fields of education, healthcare and behavioral healthCreate process to follow and understand prescription drug use and local heroin use
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My OpinionsExtensive review of scientific literaturePersonal communications with scientists in the areaPhysician in addiction medicineFormer member of FDA advisory boardFormer policy advisor to President Bush
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Pharmacology
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PharmacologyThe scientific study of the actions of drugs and their effects on a living organism and the effect of the living organism on the way the drug exerts its effectsThe classes of drugs causing substance‐related disorders are not fully distinctAll drugs that are taken in excess have in common direct activation of the brain reward system, involved in reinforcement of behaviors and production of memoriesActivation of reward system so intense that normal activities may be forgotten
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Basic PrinciplesPharmacokinetics‐ what the drug does to your bodyPharmacodynamics‐ what your body does to the drugAbsorption‐ getting inMetabolism‐ getting changedAction‐ receptor interaction‐ getting busyExcretion‐ getting out
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Psychotropic SubstanceChemical substance that crosses the blood–brain barrier and acts primarily upon the central nervous system where it affects brain function, resulting in alterations in perception, mood, consciousness, cognition, and behaviorUsed to purposefully alter one's consciousness, or as entheogens, for ritual, spiritual, and/or shamanic purposes, as a tool for studying or augmenting the mindHave therapeutic utility, e.g., as anesthetics, analgesics, or for the treatment of psychiatric disorders.
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Substance‐Related DisordersSubstance use disordersSubstance induced disorders
IntoxicationWithdrawalOther substance/mediation induced mental disorders
Psychotic, bipolar and related, depressive, anxiety, obsessive‐compulsive and related, sleep, sexual dysfunctions, delirium, and neurocognitive disordersClass specific
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The Lure and the TrapStart to use drugsPleasure experienced
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Path to AddictionInnocent beginning
Minor effectsPleasurable effectsCannot “unlearn”
Continued social useUnpleasant effects diminishEconomic costs minimalNo interference with activities
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Path to AddictionLine crossed
Consequences increaseUse to feel normalHard to connect experience to drugs
Majority of students, no observable major consequences
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Why Use a Developmental Model?
To assessTo encourage and promote growthTo understand
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Seven Areas of Development
moral
cognitive
social
physical
emotional
psychosexual
temperamentalAreas of
Development
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Four Tasks of AdolescenceSeven areas translate into four major areas where major developmental tasks are defined as:
Future
Friends
Fertility
Family
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Goals of Development are Balanced by Preoccupations of Adolescence
Sexual identity — Body image (fertility)Self identity — Friends Separation — Independence (family)Vocational selection — Value clarification (future)
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Early AdolescenceFirst efforts at separationRecognition of non‐perfect parent and rebellion against themStrong identification with peers
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Early, continuedAbstract thinkingVerbalization of valuesMood swingsDifficulty with impulse controlInsecurity about body changes
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Middle AdolescencePeak of rebellionTransition from parental to peer directionIncreased sexual interest
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Middle, continuedDifficulty with postponement of gratificationIncreased cognitive abilities Values clarification
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Late AdolescenceFirmer identityIncreased ability to express emotionsIncreased ability to postpone gratification
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Late, continuedResolution of relationship with authority figureIncreased emotional stabilityIncreased self reliance
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Why Use a Developmental Model?
To assessTo encourage and promote growthTo understand
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Discipline and IndependenceDescriptionSecurity v. FreedomLimits
ClearAge AppropriateEarnedGrowth Oriented
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Good ConsequencesRelatedReasonableTimelyEscalateConsistently appliedCalmly applied
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Bad ConsequencesRevengefulSelf‐punishingEmptyShaming
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Why Kids Use: Contrasting Views ParentsSchoolParentsPeersPushersMediaPoliceRole Models
AdolescentsFeelingsFunRisk TakingThrill SeekingAutonomyExperimentationNew Identity
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Variables to ExperimentationAvailabilityAccessPerceived Risk
Prior UsePeer UseRespect Norms
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Enabling: FeelingsProtective instinctSelf‐doubtFearPerformance anxietyAnger
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Enabling: BeliefsPressures are too greatI am not relevantAll kids do itI love, therefore, I trust
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Enabling: BehaviorsKeeping secretsAvoiding conflictShielding from consequencesDoing their work
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Adolescents’ ResponsibilitiesFeelingsBehaviorsPerformanceSocial lifeOutside lifeFuture
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Teaching AdolescentsModelingReinforcementConsistencyEncouragingPatienceAllowing mistakes
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Consequences EarlyAmbivalence about separationPersistent angerSelf harming behaviorsRebellious peers/subcultureDoubts
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Early, continuedFrustration and isolationInability to deal with the abstract ConfusionInability to learn from experiences
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Consequences, MiddleStruggles with parentsSelf involvementPeer approval seeking Active sexual fantasy life
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Middle, continuedInability to postpone gratificationUnable to abstractPoorly defined moral valuesInability to use wisdom and to evaluate situations according to appropriate values
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Consequences, LateMinor adult disturbances
Unresolved relationship and identity issuesExpression stuntedUnable to postpone gratificationPersistent emotional instabilityPersonal responsibility lagsAbility to make choices confused
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Late, continuedMood swingsDifficulty in defining vocational goalsDeficits in formulation of moral, religious, and sexual values
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CannabisGeneral Considerations
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Understanding the PlantComposition of herbal cannabis varies significantly
Rich source of variety of compoundsCannabinoidsTerpenoidsFlavonoids
Exact content of chemical composition variesPlant geneticsGrowth conditionsTime of harvestDrying conditions
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Many species exist: Cannabis Sativa (Europe), Cannabis Indica (India) and Cannabis ruderalis (Siberia and central Asia)460 known chemical constituents of cannabis66 constituents have a cannabinoid structureΔ9‐Tetrahydrocannabinol (Δ9‐THC or THC) most important constituentΔ9‐THC is the principal psychoactive component of cannabisDelivery systems do not deliver standardized doseSmoking to de‐carboxylate delivers harmful pyrolytic products
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The PlantPlant Tissue %THC
Seeds 0.0Roots 0.0Stem 0.3Leaves 0.8Seeded Female Inflorescence 6.3Unseeded Female Inflorescence 15.2
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Inflorescence
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Different Paths of Opiates and Cannabinoids
During the 1800s, the active ingredient in opium—morphine—was identified and isolated. Other opiates and synthetic medicines rapidly followedOpium was not smoked for medical purposesThe paths of medicinal opioid development and recreational use of smoked herbal opium became clearly distinct
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Different Paths continuedBy contrast, the active ingredients in cannabis remained unknownPreparations lacked standardizationsClinical response variedConditions were numerousBetter, targeted medications developedFell out of favor with the medical profession
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Cannabis: Street NamesPotReeferBudsGrassweedDopeGanjaKilobricksThai sticksMarinol®
Herb Boom Gangster Mary Jane Sinsemilla Joint Hash, hash oil Blow Blunt Green
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Cannabis: How TakenAverage THC concentration in marijuana is 1‐5%, hashish 5‐15%, and hashish oil 20%Sinsemilla derived from the unpollinated female cannabis plant, up to 17% THCSingle intake called a hit, approximately 1/20th of a gram
1‐3 hits of high potency Sinsemilla average Calculate hits for “ditch weed”
drop or two of hash oil equal to a “joint” Initial starting dose of Marinol® is 2.5 mg, twice daily
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Cannabis: Pharmacological PropertiesDuration: smoked 1‐3 hours, oral 4‐10 hours, 30 metabolitesTolerance: rapidly developsPhysical Dependence: yesPsychological Dependence: yesOnset: smoked 15 sec to 1 minute, oral‐ ½ to 1 hourPattern of Use: smoking, daily. Joint delivers 10 mg THC; average dose 20‐30 mg/dayLD 50 1270 mg/kg in male rat, 730 mg/kg in female rat. TI 40,000
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Cannabis: DistributionTHC acts on cannabinoid receptors in the brain, higher than any other receptor, naturally occurring‐anandamideCannabinoid receptors are part of the ECS
CB1 receptors concentrated in the hippocampus, amygdala, basal ganglia, cerebellum, nucleus accumbensand cortexCB2 receptors are peripheral
Functions: relax, eat, sleep, forget, and protect (DiMarzo et al 1998)
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Cannabinoid: Therapeutic UsesNausea and VomitingHIV Wasting
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Cannabis: Intoxication and OverdoseContinued use causes reverse tolerance
User becomes more sensitive to small amounts of substanceBelow 10 mg/person/day unlikely to experience tolerancePsychological dependence more likely to develop than physical dependence
Stereotypical abstinence syndrome describedAcute intoxication increases HR and conjunctivalreddeningFingertip titration of dose mediates risk of OD, more likely with oral consumption
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Cannabis: TreatmentStandard CD treatmentChallenge‐ belief that it is not dependence producingChallenge‐ difficulty in creating acceptance for patient in milieu
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Outline
Debunking the mythsPrevention works
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The Marijuana Problem
Bigger Than Previously Recognized
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The Marijuana ProblemMost widely used illicit drug in AmericaOf 5.6 million suffering, 62% are using marijuanaYoung people represent 23% of the suffering population
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Problem, ContinuedAverage age of initiation decreasingMarijuana’s potency is increasingWith increasing potency and earlier use, marijuana poses significant threat
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Problem, ContinuedOf all teens in drug treatment, 62% had primary marijuana diagnosisMore young people in treatment than for alcoholAlmost equal numbers from criminal justice and other sources
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Treatment Admissions (Ages 12 – 17) Primary Diagnosis
8%
18%
2% 2%
60%3%
8%
Alcohol onlyAlcohol w/drugOpiatesCocaineMarijuanaStimulantsOther/None
SOURCE: SAMHSA, Treatment Episode Data Set, 1999
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Debunking the Myths
Marijuana is harmlessMarijuana is not addictiveYouth experimentation is inevitableThe criminalization of marijuana use is what leads to crime, not the drug itself
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Myth 1: Marijuana Is HarmlessHealth consequencesSocial consequencesEconomic consequences
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Health Consequences DefinedAcute Effects
while intoxicated
Post acute withdrawalabstinent state in the regular, dependent user
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Health Consequences DefinedPersistent and Chronic Effects
impairments developed as a result prolonged use, endure beyond the period of intoxication impairments due to use, structural and functional changes to major organs
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Acute EffectsTime sense alterationsShort term memory lossAttention skillsGeneral difficulty expressing simple thoughts in words
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Acute EffectsMotor skillsIncrease in hungerNauseaDizziness
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Acute EffectsAlter moodEuphoriaState of relaxationPanic
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Acute EffectsAnxietyTension and angerConfusionDepersonalization and other behavioral effects
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Areas of HarmNeed for acute careCentral Nervous System Changes
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Need for Acute Care Relationship to acute need for medical assistanceRising faster than heroin caused need for medical assistance
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0
1
2
3
4
5
6
7
8
9
10
0
30,000
60,000
90,000
120,000
150,000
% DELTA
‐9 THC
DAWN M
ENTIONS
DAWN mentions Marijuana potency
Sources: Drug Abuse Warning Network, SAMHSA, August 2003Univ of Miss Marijuana Potency Report #82, Aug 2003
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0
50,000
100,000
150,00019
90
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
Heroin MarijuanaSource: SAMHSA, Drug Abuse Warning Network
*NOTE: Data prior to 1994 may not be comparable to 1994 through 2001
DATA BREAK*
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Central Nervous SystemSites of actionMemoryPsychological vulnerability
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Mechanisms of ActionProduces anticipated and unanticipated effects binding with receptorsHigh‐affinity sites specific for CannabinoidsTwo receptors CB1 And CB2
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Human MemoryMost profound effect on recent memoryLong term memories not affectedIncapable of functioning on the basis of knowledge regarding his personal life
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More on MemoryHippocampus has receptors for endogenous “marijuana” (anandamide)Hippocampal damage is associated with failure to make new memories If stimulate receptor, hippocampus activity decreases
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With repeated use, tolerance to loss of memory developsWith repeated use, tolerance to drug develops and user uses more drugYou do the math
More on Memory
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Post Acute EffectsHuman aggressive respondingConditions
Provoke subjects coming off drugProvide opportunity to retaliateMeasure amount of retaliation
Acute Marijuana, Ss with ASPDIncreased aggressive responding
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Persistent and Chronic EffectsPhysicalPsychological
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PhysicalRespiratory
Carcinogenic componentsAir obstructionDecreased exercise toleranceChronic coughBronchitisDecreased pulmonary functionCancer
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PhysicalCardiovascular
Increases in heart rateCan aggravate existing cardiac conditions or hypertensionReversed with abstinence
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PhysicalReproductive
Inhibitory effects on pituitary leutenizing hormone, prolactin, and growth hormoneDecreases plasma testosterone, sperm count and motilityMarijuana is antiandrogenic with decreased libido or impaired fertilityDisrupts female reproductive systemImpacts pregnancy in adverse ways
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Physical Immune impairment
Contradictory in human studiesAnimal models show impairmentDecreases signals to T helper cellsInterferes with macrophage antigen processingMay increase the risk of cancer (cancer surveillance system)
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PsychologicalPsychiatric illness‐ no specific syndromes, however, may precipitate an illnessVisual distortionsDecrease in color discriminationDecrease in ocular trackingDecreased detection, recognition and analysis of peripheral visual field
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Psychological‐ CognitiveImpairment in ability to learnListening and repetition learning compromisedHeavy use associated with deficits in mathematical skill and verbal expression
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Social ConsequencesMarijuana changes the way sensory information is processedPoor performance in schoolIncreased delinquency
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Economic Consequences:Lost employee productivityPublic health care costsAccidents and crashesAmericans spend close to $11 billion annually on marijuana purchases
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MYTH 2: Marijuana Is Not Addictive
Science of dependence and addictionSyndrome described
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Laboratory EvidenceMarijuana is much more powerful today than it was 30 years ago Marijuana addicts experience withdrawalThere is an animal model for dependence
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Absorption and MetabolismSelf administration is by smoking and inhalationCan be taken orally
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Absorption and MetabolismSmoke contains more than 150 compoundsMany of the Cannabinoids have psychoactive properties
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Pharmacology Is ComplexVolatilized THCDeep inhalation Rapid absorption from the lungsTHC and major metabolites traced throughout body and brain
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Physical Dependence Producing Properties
Long half lifeLow clearanceHigh intrinsic pharmacological activity
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Reinforcing PropertiesRapid absorptionHigh intrinsic pharmacological activityRapid entry into specific regions of brain
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ToleranceTolerance develops quickly and continues for a long time after stopping
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Syndrome DescribedInsomniaAbstinenceNauseaAnorexia
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Syndrome DescribedAgitationRestlessnessIrritabilityDepressionTremor
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Syndrome DescribedAfter 21 days of heavy use
Onset 10 hours of cessationPeaks within 48 hoursTerminates by fifth day of abstinence
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Clinical ObservationsAntisocial problems associated with progressionOne in ten who try develop dependence
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MYTH 3: Youth Experimentation With Marijuana Is Inevitable
Peer to peer spread has been misunderstoodThe majority of young people do not useRecent decreases belie the belief that “nothing works”
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MYTH 4: Criminalization Leads to Crime, Not the Drug
Non‐dependent use is harmfulWhen controls are lifted, harms are increased
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Research LinksMarijuana use and violenceAvailability increases useThe Dutch experiencePrison data
<0.5% of prisonersTonnage of supply
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Responsible Public PolicyStopping InitiationBrief and Early InterventionsTreatment Improvement
Denial GapMotivation GapTreatment GapRecovery Gap
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When Controls Are LiftedDrug Culture Messages
Drugs can’t hurt you Drugs are funYou can use responsibly
1970s experience
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During the 1970s11 states decriminalized marijuana30,000 head shops “Responsible‐use” messagesDrinking age of 18Sale of cigarettes, alcohol to teens
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By 1979, % Users35% of adolescents65% of young adults had tried an illicit drug
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Prevention MessagesDrugs can hurt youDrugs cause addiction and deathDrugs are not healthyBreaking the law is not responsible
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Parent MovementFormed 3,000 parent groupsStopped decriminalizationBanned head shops
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Parent Movement“No‐use” messagesDrinking age of 21Worked to stop sale of cigarettes, alcohol to adolescents
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Results From 1979 to 1992…Drug use drops by 2/3 among adolescents, young adultsDaily marijuana use drops 500 percent
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Fact: We Can Make A DifferenceWhen communities come together, the drug problem recedesProven techniques can halt marijuana use:
Student drug testingParent involvementRespect for community norms and lawsScience‐based drug prevention
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0
2
4
6
8
10
12
14
16
18
20
All Grades
Source: University of Michigan, Monitoring the Future Study, 2003
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Major Forms of Drug Use Alcohol UseCocaine UseHallucinogen UseHeroin UseInhalant UseMarijuana UseMethamphetamine UseSedative‐Hypnotics and Anxiolytics Use Nicotine Use
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Classes of Prescription DrugsI‐ High potential for abuse, no accepted medical use in U.S., lack of accepted safety under medical supervisionII‐ High potential for abuse, current accepted use with severe restrictions, may lead to dependenceIII‐ Potential for abuse, currently accepted use, low or moderate physical dependence and high psychological dependence
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Classes of Drugs, continuedIV‐Low potential for abuse, accepted use, limited dependenceV‐ Low potential for abuse, accepted use, narrow scope for physical and psychological dependence
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What is Prescription Drug Abuse?Misuse: use of a medication (for a medical purpose) other than as directed or as indicated, whether intentional or unintentional” (Katz et al 2007)Abuse: the intentional self‐administration of a medication for a nonmedical purpose such as alerting one’s state of consciousness, e.g., getting high (Katz et al 2007)
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What is the Difference Between Therapeutic Use and Abuse
Dose and frequency of dosingLower, fixed regimes vs. escalating use
Route of administrationOral vs. snorting vs. smoking vs. injecting
Expectation of durg effectsExpectation of clinical benefit vs euphoria, “high”
Context of administrationHome or hospital vs school, disco, bar, party, etc.
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0
0.01
0.02
0.03
0.04
0.05
0.06
0 20 40 60 80 100 120
Upt
ake
in S
triat
um (%
/cc)
Time (minutes)
0
0.01
0.02
0.03
0.04
0.05
0.06
Upt
ake
in S
triat
um (%
/cc)
0
0.0005
0.001
0.0015
0.002
0.0025
0.003
0.0035
0 20 40 60 80 100 120
Upt
ake
in S
triat
um (n
Ci/c
c)
Time (minutes)
iv cocaineiv cocaine iv Ritaliniv Ritalin oral Ritalinoral Ritalin
Rate of Drug Uptake Into the BrainRate of Drug Uptake Into the Brain
Cocaine (iv) and Ritalin (iv) produce a “high” but Ritalin (oral) does not.
The slow brain uptake of oral Ritalin permits effective treatment without a “high.”
Cocaine (iv) and Ritalin (iv) produce a “high” but Ritalin (oral) does not.
The slow brain uptake of oral Ritalin permits effective treatment without a “high.”
0 20 40 60 80 100 120Time (minutes)
Fast!!Fast!! Slow!!
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Fastest Growing Drug Trend in the US:
New users aged 12 and older of prescription drugs outnumber new users aged 12 and older of marijuana (SAMHSA 2004)48 million people have used a prescription drugs for nonmedical reasons (NIDA, 2005)More than 3 million teenagers abuse prescription drugs (2007 NSDUH)
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Why has prescription drug abuse been
increasing?
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Increased Media Attention
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Why are These Drugs Abused?Self‐medicating:
some people use medications prescribed to them in ways other than those described by the prescriber (dosage, frequency)Some people use medications prescribed to someone else to treat themselves (taking a family member’s pain reliever for your pain)
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Why Abused, continuedTo get “high”:
Some people use medications to achieve an altered state of consciousness
To perform:Some people use stimulants to concentrate, increase alertness
Other:Weight management (stimulants)
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Just Because It’s Prescription Does Not Mean It’s Safe
Many people falsely believe that since prescription drugs are legal and medical in nature, they are safer than street drugs (Partnership for Drug Free America, 2005)
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Prescription…safe, continuedOne third of teens believe that it is OK to use a prescription medication with a prescription once and a while (Partnership for Drug Free America 2006)29 percent of teens believe that prescription pain relieves are not addictive (Partnership for a Drug Free America 2006)
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Non‐Therapeutic Use of Prescription Drugs
Non‐medical use of prescription drugs represents a relatively small percentage of all use of these medications, but it is a problem that requires attentionA variety of adverse health and social consequences arise from the interactions of multiple drugs (prescribed or illicit) used concurrently
62% of treatment admissions with opiates (other than heroin) as primary substance of abuse reported abuse of other substances.The most commonly reported secondary substances of abuse were alcohol (21%) and marijuana (20%), as well as tranquilizers and non‐smoked cocaine (10% each)
Source: Substance Abuse and Mental Health Services Administration, Office of Applied Studies. Treatment Episode Data Set (TEDS): 1996-2006. National Admissions to Substance Abuse Treatment Services, DASIS Series: S-43, DHHS Publication No. SMA 08-4347. Rockville, MD; 2008. Available at: http://wwwdasis.samhsa.gov/teds06/teds2k6aweb508.pdf.
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AgeTeenagers, young adults, and those over 60 account for the majority of abusers: More young people are experimenting with prescription drugs than are experimenting with marijuana (SAMHSA 2004)9 percent of adolescents used prescription medication for nonmedical reasons in 2004 (NSDUH 2004)17 percent of those over 60 abuse or misuse prescription drugs (SAMHSA 2003)
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College StudentsThe median age of new users is 23 (NSDUH)
The majority obtained from a peer
Those who abuse pain relievers are:8 times more likely to use marijuana4 times more likely to binge drink
Those who abuse stimulants are:24 times more likely to use marijuana7 times more likely to binge drink (McCabe, Boyd 2005)
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GenderAmong college students, both men and women are more likely to abuse opioids than stimulants, but men are more likely than women to abuse either (McCabe et al, 2005)Teenage girls are more likely than teenage boys to abuse prescription drugs (ONDCP 2007)
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Nonmedical Prescription Drug Use
“Not prescribed for you
or
“You took the drug only for the experience or feeling it caused”
(Excludes OTC)
133
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Num
ber i
n T
hous
ands
Source: NSDUH 2007
Nonmedical Use of Pain Relievers in Lifetime, Past Year, and Past Month 2007
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17.1 17.6 18.320.2 20.2 21.2 21.8 21.9
24.0 24.2 24.5
0
5
10
15
20
25
30
Marijuana Sedatives
Inhalants
Cocaine
OxyContin®LSD TranquilizersHeroinEcstasy
PainRelievers
Stimulants
Mean Age at First Use for Specific Illicit Drugs among Past Year Initiates Aged 12 to 49: 2007
135
Age in Years
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Why is This Such a Problem?
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Michael Jackson is Not the First Victim
Admissions to treatment centers for prescription pain relievers increased 300 percent from 1995 to 2005 (ONDCP 2008)
Admissions to hospitals for overdoes of prescription pain relievers increased a similar amount in the same time period (ONDCP 2008)
There is evidence that abusers of OxyCotin® graduate to heroin (Educating Voices)
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Model Treatment ProgramsBio‐behavioral assessment Detoxification considerationsCounselingMedical treatmentPsychiatric careReferral to wrap around servicesLong term follow‐up
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ASAM GuidelinesLiterature reviewConsensus discussionField and Peer reviewConclusions and recommendations regarding the therapeutic value of smoked marijuana and the role of the physician
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Why President’s Action?Research in therapeutic potential lags behind other modern medicationsRecent discoveries and elucidation of endocannabinoid receptor system coupled with new research tools facilitates analytical, pharmacological, and other preclinical researchLiberal cannabis distribution puts patients with medical conditions and others at risk in setting of little scientific evidence to guide rational/ethical action
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ASAM Paper OutlineModern HistoryBasis for Cannabinoid Therapeutics“Medical Marijuana” in the U.S.Reports from Expert BodiesProfessional OrganizationsThe Federal PositionFederal Departments and Agencies
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Outline ContinuedModern Medications and the FDA “Medical Marijuana” and the Modern Medication ModelOther CountriesExisting ResearchOral Cannabinoid PreparationsAre There Principled Reasons to Exempt Cannabis?
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Outline ContinuedCould a Cannabis Preparation Achieve FDA Approval?The Significance of SchedulingConclusionRecommendationsWWW.ASAM.ORG publications: policy statements: featured policy statements: Medical Marijuana
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Pharmacological StrategyExploit properties of the cannabinoid system while minimizing the psychotropic effects of the molecule(s) used
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Significance of FindingsCloning of CB1 and CB2 enabled discovery of endogenous agonists and enzymes that catalyze endocannabinoid inactivationEndocannabinoids that are produced endogenously following onset of pathology may act in site‐ and time‐ specific manner to minimize consequences of condition
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Significance, continuedThe endogenous endocannabinoids may differ significantly from THC and synthetic CB1 and CB2 agonists in their ability to limit extension of insult, injury
Preclinical data supports this view: animal benefit in neuropathic pain, anxiety, irritable bowel syndrome, proliferation and migration of CA cells
Clinical target at degrading enzymes to prolong pro‐homeostatic actions
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Important Take‐Home MessagesEndocannabinoids are neurotransmitters, may have protective function in response to injury/insultCannabinoids (e.g., THC) modulate neural activityEndocannabinoids are involved in synaptic re‐modelingCannabinoids (e.g., THC) can modulate synaptic re‐modelingDepending upon the specific CNS circuits involved, cannabinoids can have a host of actions on brain, cognition, and behavior (some beneficial, some not)
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What WE KnowUnimpeachable Preclinical ResearchIndicates That There Are Many Diseases (Some Currently Totally Untreatable) That Can Be Successfully Treated By Cannabinoid Agonists or Antagonists
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What We KnowUnimpeachable Preclinical ResearchIndicates That There Are Many Ways In Which The Endocannabinoid System of The Body Can Be Manipulated to Produce Either Cannabinoid Agonist or Antagonist Actions
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Potential Cannabinoid TherapiesDiseases of Energy Metabolism
Appetite DysregulationObesityDyslipidemiaPeripheral Energy Metabolism DysregulationCachexiaAnorexiaType II Diabetes
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Potential TherapiesPain
Somatosensory PainNeuropathic Pain
CNS DisordersClosed Head Brain TraumaSpinal Cord InjuryMultiple SclerosisTourette’s SyndromeParkinson’s Disease
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Potential TherapiesCNS Continued
Alzheimer’s DiseaseEpilepsyAnxietyDepressionInsomniaPost‐Traumatic Stress DisorderSchizophrenia
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Potential TherapiesCardiovascular & Respiratory
HypertensionHypotensionCirculatory ShockMyocardial Reperfusion InjuryAtherosclerosisCardiopathiesAsthma
Inflammation
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Potential TherapiesEye Disorders
GlaucomaRetinopathyIntraocular Pressure
Reproductive DisordersMusculoskeletal Disorders
ArthritisOsteoporosisPost‐Fracture Bone Healing
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Potential TherapiesGI and Liver Disorders
Inflammatory Bowel DiseaseUlcerative ColitisHepatitisCirrhosis – EncephalopathyCirrhosis – Liver FibrosisCirrhosis – Vasodilatation
CancerCancer Cell ProliferationColorectal Cancer
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Why Do We Care About the FDA Process?
Protect patient health and safetypromote quality, safety and efficacy of medications
Testing for body of risk/benefit and pharmacological data Registration/inspection ensures manufacturing quality control toolsPromotional activities of manufacturers limitedProducts prescribed/dispensed under the supervision of licensed health providers
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Modern Regulatory Approval Requirements
QualitySafety Efficacy
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Quality Product CompositionCharacterizationQuantification of componentsStandardization / Consistency Stability / Storage
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SafetyAnimal data, including:
CarcinogenicityReproductive and chronic toxicologyGenotoxicologySafety pharmacology
Clinical dataSeveral hundred patient‐years of data requiredReports of all adverse events (mild/moderate/severe –related and unrelated)Immediate regulatory notification of serious adverse events
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Efficacy
Multiple Phase II & Phase III placebo‐controlled clinical trials for each target clinical indication
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Hazards of Marijuana contrasted with Pharmaceutical Product
Harmful constituents of smoked marijuanaBronchial irritation and pyrolytic compounds in a bad delivery system
Potential for abuseReward
Recreational users seek the “high”Manage therapeutic window
Lack standardization with contaminationFungi, heavy metals, variance
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Contrasts, continuedNo regulation of sources of manufacture and distribution
Distribution chain monitoring
Lack of patient information and supportUnable to study in RCTs, lack information to advise
LiabilityInsurance does not cover recommendation of illegal product, patients are on their own
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Contrasts, continuedStigma
Illegality of product, not covered by heath care insurance, stress/anxiety/ inconvenience associated with illegal product
AccessNot contained within health care environments
Public health considerationsUndermines prevention‐ perception of risk
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Giving Cannabis a Free Pass = ?By creating an exception for cannabis, we are preventing the development of Q, S &E data that would allow it to become broadly accepted as a true medicationThe vast majority of patients want a product that is standardized by composition and dose and about which their physicians can offer meaningful advice
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There’s More Than THC!Cannabis used centuries ago would have involved a 1:1 CBD:THC ratioTHC (tetrahydrocannabinol):
is analgesic, anti‐spasmodic, anti‐tremor, anti‐inflammatory, appetite stimulant, anti‐emetic
CBD (cannabidiol): does not bind to CB1 cannabinoid receptor, but does bind to other receptors in the body; is anti‐inflammatory, analgesic, anti‐convulsant, anti‐psychotic, anti‐oxidant, neuroprotective;reduces the negative effects of THChas been bred out of modern herbal cannabis!
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What’s Coming? Generic versions of Synthetic THC, including hard or room temperature capsulesCannabis‐derived pharmaceutical productsCB2 agonists THC‐precursor suppositoriesTransdermal THC deliveryInhaled THC
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What’s Coming?THC tabletsTHC syrup50 states with “medical marijuana” laws? State level “legal” marijuanaFederal laws decriminalizing medical use (or any use) of marijuana?All of it?
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Safe Storage
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Lock Your MedsThe National Family Partnership and the Center
for Lawful Access and Abuse DeterrencePublic education campaignDeveloped innovative lockbox to store medications safelyHome inventory checklistFacts on abuse
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ResourcesASAM website for PPC (http://www.asam.org/publications/patient‐placement‐criteria/ppc‐2r)NIDA (http://drugabuse.gov/) Two Dreams (http://www.twodreams.com)Dr. AGB (https://twitter.com/dragb)Dr. AGB Goes to Back Rehab (http://drbarthwell.wordpress.com/)The Challenge in Higher Education: Confronting and Reducing Substance Abuse on Campus (https://www.ncjrs.gov/ondcppubs/publications/pdf/challenge_higher_ed.pdf/)Teenage Drug Use Checklist (http://timetoact.drugfree.org/know‐get‐focused.html)Parents Toll‐Free Helpline (http://timetogethelp.drugfree.org/learn/helpline)ASAM website for Policy Statements (http://www.asam.org)CLAAD for Citizen’s Petition, membership, news (http://claad.org)Two Dreams for clinical information (http://www.twodreams.com)
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Thank You!Questions?