The Search for the Magic Bullet: Can the Use of …...* Gaoni Y, Mehoulam R. Isolation, structure...
Transcript of The Search for the Magic Bullet: Can the Use of …...* Gaoni Y, Mehoulam R. Isolation, structure...
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TheSearchfortheMagicBullet:
CantheUseofMedicalCannabisDecreaseOpioidUse
orMortality?ErnestJ.Dole,PharmD,PhC,FASHP,BCPSClinicalPharmacist
PainConsultation&TreatmentCenterUniversityofNewMexicoHospitals
&ClinicalAssociateProfessorUniversityofNewMexico
CollegeofPharmacy
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TheDepartmentofHealth–MedicalCannabisProgram(DOH-MCP)cer>fiesthatalloftheinforma>oncontainedintheseslidesistrueandcorrect.Theslidedeckisavailableforusebyen>>esoutsideofDOH-MCPwithpermission.PLEASEBEAWAREthatifthismaterialispresentedbyanagencyotherthanDOH-MCP,DOH-MCPcannotaNesttothevalidityoftheinforma>onpresentedinconjunc>onwiththeseslides.
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� Cannabisplantanditsusesdatetoasearlyas4000BC
q NamedforGreekwordforhemp,kannabis
� Longrecordedhistoryinmedicalwriting;documenteduseforpain,dysentery,nausea/vomiting,spasms,andconvulsions
� Renderedillegalin1937
� DroppedfromtheUSPharmacopeiain1941
* BoothM.Cannabis:Ahistory.NewYork:Picador(St.Martin’sPress),2003.* GaoniY,MehoulamR.Isolation,structureandpartialsynthesisofanactive
constituentofhashish.JAmChemSoc1964;86:1646-7.* MatsudaLA,LolaitSJ,etal.Structureofacannabinoidreceptorandfunction
expressionoftheclonedcDNA.Nature1990;346:561-4.* GuindonJ,BeaulieuP,HohmannAG.Pharmacologyofthecannabinoid
system.In:BeaulieuP,LussierD,PorrecaF,DickensonAH,eds.PharmacologyofPain.Seattle,WA:IASPPress;2010.
BriefHistoryofCannabis
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* Attheendofthispresentationtheparticipantwill:* BeabletodiscussthepharmacologyofTHC&CBD* Demonstrateanunderstandingofthe“entourage
effect”ofcannabis* Appreciatehowtheuseofcannabiscandecrease
painforpatientwithchronicnoncancerpain(CNCP)* Appreciatehowtheuseofcannabiscandecrease
theamountofopioidmedicationutilizedinpatientswithCNCP
Objectives
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n 1970-ControlledSubstancesActclassifiedmarijuanaasadrugwith“noacceptedmedicaluse”;ie:ScheduleI
n 1976-FederalCourtrulesRobertRandall’suseofmarijuanaa“medicalnecessity”
n 2018-29statesandtheDistrictofColumbiahaveapprovedmedicalcannabisprogramsand9statesandWashington,DChavelegalizedforcannabisadultforrecrea>onaluse.
BriefHistoryofCannabisintheUS
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Endocannabinoid System
https://www.youtube.com/watch?v=Vtc11kRinf4
Brain (CB1) GI Tract (CB2
and CB1)
Liver (CB1 and CB2)
Skeletal Muscle
Adipocyctes (CB1)
Peripheral Nerves (CB1)
Immune System (CB2)
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n Theendocannabinoidsystemn Innatebiologicsystemn Responsibleforregula>onofmul>plebodysystemsn CB1andCB2receptorsthroughoutthebodyn Noreceptorsinbrainstem
n Clinicaldataavailableontheuseofcannabistotreatsymptomsrelatedtoseriousmedicalcondi>ons
n Cannabismayprovidereliefforpa>entswhosesymptomsareunrelievedbyothermeans
TheMedicalCannabisSystem
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n Composed of up to 400 components, including non-intoxicating components n 120 terpenoids: aromatic compounds n 21 flavonoids: antioxidants n 11 plant sterols (seed) n 22 fatty acids
n THC and CBD are the two main studied components of cannabis out of 60-100 active cannabinoids
n CBD can mitigate adverse effects of THC* CasciniF,AielloC,DiTannaG.Increasingdelta-9-tetrahydrocannabinol(Δ-9-THC)contentinherbalcannabisovertime:systematicreviewandmeta-analysis.CurrDrugAbuseRev.2012Mar;5(1):32-40.* GuindonJ,BeaulieuP,HohmannAG.Pharmacologyofthecannabinoidsystem.In:BeaulieuP,LussierD,PorrecaF,DickensonAH,eds.PharmacologyofPain.Seattle,WA:IASPPress;2010.
CannabinoidComponents
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Endocannabinoids
v Naturalsubstancesproducedbythebody
v Bindtoreceptorsthroughoutthebody
v Noreceptorsinbrainstem
v Exogenouscannabisplanthas>60cannabinoids
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v euphoricv stimulant
v muscle-relaxingv analgesicv anti-emetic
v appetitestimulatingv lowersintra-ocularpressure
v AHighTHCis15-25%
THC(delta-9-tetrahydrocannabinol)
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ResearchedAttributesAnxiolyticAnti-psychoticAnticonvulsantAnti-oxidantAnti-inflammatory
Anti-ischemicAnti-emeticAnti-tumorNeuroprotection
CBD(Cannabidiol)
*CBDmitigatesthepsychoactivesideeffectofTHC-AhighCBDis5-15%
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EndocannabinoidSystem&Pain
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v NandP/QVSCCblockadev K-irpotentiationv VSSCblockadev mapKinaseactivationv mastcellinhibitionv modulationofGABAergic,glycinergic,andglutamatergicneurotransmission
EndocannabinoidSystem&Pain
ManzanaresJ,etal.Roleofthecannabinoidsysteminpaincontrolandtherapeuticimplicationsforthemanagementofacuteandchronicpainepisodes.CurrNeuropharmacol2006;4(3):239-257.GuindonJ,BeaulieuP,HohmannAG.Pharmacologyofthecannabinoidsystem.In:BeaulieuP,LussierD,PorrecaF,DickensonAH,eds.PharmacologyofPain.Seattle,WA:IASPPress;2010.WhitingPF,WolffRF,DeshpandeS,etal.CannabinoidsforMedicalUse:ASystematicReviewandMeta-analysis.JAMA.2015;313(24):2456-2473.doi:10.1001/jama.2015.6358
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Poten>alTherapeu>cEffects/BenefitsTHC(delta-9-tetrahydrocannabinol)* Intoxica>ngeffects* Appe>tes>mulant* Decreasedintraocularpressure
* Analgesic/neuropathicpain
* An>spasmodic* An>eme>c
CBD(cannabidiol)* Notintoxica>ng* Analgesic/neuropathicpain
* An>psycho>ceffects* An>convulsant* Neuro-protec>veeffects* An>spasmodic* An>eme>c
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v Preventionofpaclitaxel-inducedpainfulneuropathyv Medicationoveruseheadache,migraine,andclusterv Cancerpainv Neuropathicpainv Osteoarthritisv Centralsensitizationv Brachialplexusavulsionv Fibromyalgia* BestardJA,etal.Anopen-labelcomparisonofnabiloneandgabapentinasadjuvanttherapyormonotherapyinthemanagement
ofneuropathicpaininpatientswithperipheralneuropathy.PainPractice2011;11(4):353-368.* AkermanS,etal.EndocannabinoidsinthebrainstemmodulateduraltrigeminovascularnociceptivetrafficviaCB1andtriptan
receptors.JNeurosci2013;33(37):14869-14877.* PortenoyRK,etal.Nabiximolsforopioid-treatedcancerpatientswithpoorly-controlledchronicpain.JPain2012;13(5):438-449.* PiniLA,etal.Nabiloneforthetreatmentofmedicationoveruseheadache.JHeadachePain2012;13:677-684.* GuindonJ,BeaulieuP,HohmannAG.Pharmacologyofthecannabinoidsystem.In:BeaulieuP,LussierD,PorrecaF,DickensonAH,
eds.PharmacologyofPain.Seattle,WA:IASPPress;2010.* BurstonJJ,etal.CannabinoidCB2receptorsregulatecentralsensitizationandpainresponseassociatedwithosteoarthritisofthe
knee.PLOSOne2013;8(11):1-9.* WhitingPF,WolffRF,DeshpandeS,etal.CannabinoidsforMedicalUse:ASystematicReviewandMeta-analysis.JAMA.
2015;313(24):2456-2473.doi:10.1001/jama.2015.6358
UtilityinPain
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v Low(6-20%)andvariablebioavailability v Peakplasmawithin1-6andmayremainelevatedforseveralhours
v Initiallyoxidizedinliverto11-OH-THC,apotentpsychoactivemetabolite
v Furtheroxidationof11-OH-THCleadstoeliminationproducts(urineandfeces)
v Terminalhalflife20-30hrs
OralTHCPharmacology
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v Rapidlyabsorbedintobloodstreamandredistributed
v Considerableamountofdoselostinsmoking
v Peakbloodlevelsachievedatendofsmoking,declinerapidlyover30minutes
v Smokingachieveshigherpeakconcentrationbutshorterdurationofeffect
v Smalleramountsof11OH-THCformed
SmokedTHCPharmacology
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n Toxicityn Nolethaloverdosesreportedfromcannabisalonen Lesstoxicity/lethalityra>othanalcohol,opiates,
barbiturates,andsomecommonmedica>onsn DependenceandWithdrawal
n Es>matesofdependencearehighlycontroversialn Mild,short-livedfeelingsofwithdrawaloccurforsome
n OtherDrugUsen Noconclusiveevidencecannabisleadstoothersubstances
ofabuseorthatmedicalprogramsincreaseuseamonggeneralpopula>on
n Typical“gateways”aretobaccoandalcohol
CommonQues>ons
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n CentralNervousSystemn Canbetreatmentlimi>ng–generallyseeanxiety/
paranoian StrainswithlowerTHCandhigherCBDcontentless
psychoac>ven Neuropsychiatric
n Teensandyoungerpopula>ons–ques>onsregardingcogni>vedevelopment,memory,andpsychiatricillness
n Other–Generaln Cardiovascular,appe>te,nausea,hyperemesis
syndrome,headache,decreasedcoordina>on/musclestrength,thirst/drymouth,red/dryeyes
Poten>alAdverseEffects
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Pharmaceu>calPrepara>onsn Dronabinol(Marinol),issynthe>cΔ9-tetrahydrocannabinol
(THC),usedasanappe>tes>mulant,an>eme>c,andanalgesic.Approvedin1986forN&VfromChemotherapy;AIDSanorexiain1992
n Nabilone(Cesamet),asynthe>ccannabinoidandananalogofMarinol.ItisScheduleIIunlikeMarinol,whichisScheduleIII
n Nabiximols(Sa>vex),acannabinoidextractoralspraycontainingTHC,CBD,andothercannabinoidsusedforneuropathicpainandspas>cityin22countriesincludingEngland,CanadaandSpain(notavailableintheUS).Sa>vexisawhole-plantcannabinoidmedicine.
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n Marinolissynthe>cTHCn Onlyoneofmanycannabinoidsinthecannabisplant
(“EntourageEffect”)
n Thepsychoac>vecomponentmaypresentadura>onofac>onthatisnotacceptabletothepa>ent
n Manyothercannabinoidsintheplanthaveimportanteffectsn An>-inflammatory,an>-nausea,neuroprotec>on
n DifferentstrainsofcannabishavevaryingTHCcontentandvariouseffectsonsymptoms
n Ifusedfornauseaandvomi>ng,pa>entmayhavedifficultytolera>ngoralmedica>ons
WhyIsn’tMarinolEnough?
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SafetyofPharmaceu>calCannabinoids
n Lowabusepoten>alofprescrip>oncannabinoidsn Dronabinol(Calhoun1998)n Nabilone(Ware2010)n Nabiximols(Robson2011)
n Noevidenceoftolerance(Rog2007,Serpell,2013)
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v CNSsideeffectsprimarilyanxietyandparanoia
* StrainswithlowerTHCcontentlesspsychoactive
v Generalphysicaleffects* changesinappetite,thirst,nausea,headache,decreasedcoordination,reducedmusclestrength,drymouth,andsensitivitiesincludingrednessanddrynessoftheeyes.
v Toxicity* Nolethaloverdosesreportedwithnonderivativeproducts
* Lesstoxicity/lethalityratiothanalcohol,opiates,barbiturates,andsomecommonmeds
AdverseEffects
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v AcutemedicalriskofTHCareratherlowv Fataloverdosewithcannabisalonehasnotbeenreported
v Additiveeffectsofcannabis,anticholinergicsandCNSdepressants* (e.g.,sedation,drymouth,dizziness,andconfusion)* Smokingitself(cannabisortobacco)inducesCYP1A2v Mayincreaseclearanceofanti-psychoticsandanti-
depressantsv MetabolizedbyP450,littleevidencesupportingdrug-drug
interaction* Chronicopiateusershaveseenapotentialreductionofdoseswheninconjunctionwithmedicalcannabis
AcuteDrugInteractions
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Cannabinoid-OpioidInteractioninChronicPain
v Objectivesv EvaluateeffectofvaporizedcannabisonBloodlevelsofprescribedopiates(SRmorphineandSROxycodone)
v Determinetheshort-termsideeffectsofco-administrationofcannabisandopioids
v AssesseffectofvaporizedcannabisonlevelofChronicpain
v N=21v FundedinpartbyNIDAandNIHCRCgrants
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* Study* 21ptswithchronicpain,ontwice-dailydosesofsustainedreleasemorphineoroxycodonewereadmittedfora5-dayinpatientstay* Askedtoinhalevaporizedcannabisintheeveningofday1,threetimesadayondays2–4,andinthemorningofday5* Theextentofchronicpainwasassesseddaily* Results* NosignificantchangeintheAUCforeithermorphineoroxycodoneafterexposuretocannabis* Painwassignificantlydecreased(average27%)aftertheadditionofvaporizedcannabis* AbramsDI,CoueyP,ShadeSB,KellyME,BenowitzNL.ClinPharmacolTher.2011Nov2.90(6):844-51.
Cannabinoid-OpioidInteractioninChronicPain
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v Co-administrationofvaporizedcannabiswithoralsustainedreleaseopiatesissafe
v Co-administrationofvaporizedcannabisinsubjectsonstabledosesofmorphineoroxycodoneappearstoenhanceanalgesia
v Co-administrationofvaporizedcannabistrendstowardsloweringconcentrationoftheopioidsoftheopioids* ThePKeffectswouldbeexpectedtoreducetheanalgesiceffects
ofopioids.* Theeffectsofvaporizedcannabistoenhanceopioidanalgesia
occursbyapharmacodynamic,notapharmacokineticeffectv AbramsDI,CoueyP,ShadeSB,KellyME,BenowitzNL.ClinPharmacolTher.2011Nov2.90(6):844-51.
Cannabinoid-OpioidInteractioninChronicPain
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v Cannabisusecommonamongopioid-dependentindividuals* Rangefrom20%to95%* Cannabisuseassociatedwithdrugdealingandneedlesharing
v Cannabiseffectsontreatmentforopioid-dependence* Cannabisuseassociatedwithfasterrelapsetoalcohol,cocaine
andheroinuse* Inchronicopioidtherapyforpain,cannabisusewasapositive
predictoroffutureopioidmisuse* Cannabisusestronglyassociatedwithincreasedriskforother
substanceuseanddependence* Thesewereself-selectedcannabisusers
v ScavoneJL,SterlingRC,VanBockstaeleEJ.Neuroscience.2013Sep17;248:637-54
Cannabis&OpioidUse/Abuse
.
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v Manystudieshavedemonstratedcannabisuseassociatedwithpositivetreatmentprognosisamongopioid-dependentcohorts* Cannabisabuse&dependencewerepredictiveofdecreasedheroin&cocaineuseduringtreatment* IntermittentuseofcannabiswasassociatedwithalowerpercentageofpositiveopioidUDSandimprovedmedicationcomplianceonnaltrexone* Cannabisimprovedopioid-dependencetreatmentretention* Cannabisusemaybenefitopioidusersinwithdrawal* Thesewereself-selectedcannabisusers* ScavoneJL,SterlingRC,VanBockstaeleEJ.Neuroscience.2013Sep17;248:637-54
Cannabis&OpioidUse/Abuse
.
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* Thesubstance-dependentpopulationmaydiffersignificantlyfromdrugnaïveorrecreationalsubstanceusers
* Correlationwithmedicalcannabisusersisdifficultbutsuggeststhatasidefromdirect,pain-relatedbenefitsofcannabisindelayinginitiationandadjunctivepain-relief,cannabismayprovidepositiveeffectsinopioidabusersv ScavoneJL,SterlingRC,VanBockstaeleEJ.Neuroscience.2013Sep17;248:637-54
Cannabis&OpioidUse/Abuse
.
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v Receptorsystemsofbothcannabinoidsandopioidsareknowntomediatecommonsignalingpathways
v Drugsthattargetboththecannabinoidandmorphinereceptorsystemspossesssharedpharmacologicalprofiles* Agonistsofbothreceptortypeshavebeenshowntocausepainrelief,sedation,hypotension,motordepression,anddrugreward/reinforcementv ScavoneJL,SterlingRC,VanBockstaeleEJ.Neuroscience.2013Sep17;248:637-54
Cannabinoid-OpioidInteraction
.
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v Studiesdemonstratecross-tolerance,mutualpotentiation,andreceptorcross-talk* Impliesthatpainrelieffromcannabinoidsaremorethanjustpsychotropic-based
v Cannabinoidsmaymodulateopioidfunctionatanumberofdifferentlevelswithinthecell* Potentialforadditivepainreliefwithcombinationofopioids&cannabinoidsv ScavoneJL,SterlingRC,VanBockstaeleEJ.Neuroscience.2013Sep17;248:637-54
Cannabinoid-OpioidInteraction
.
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v Timeseriesanalysisofmedicalcannabislawsandstate-leveldeathcertificatedataintheUSfrom1999to2010;all50statesincluded
v Stateswithmedicalcannabislawshada24.8%lowermeanannualopioidoverdosemortalityrate(95%CI,-37%to-9%,P=0.003)
v ExaminationoftheassociationbetweenmedicalcannabislawsandopioidanalgesicoverdosemortalityineachyearofimplementationofthelawshowedalowerrateofODmortalityovertimethatgenerallystrengthenedovertime* BachhuberMA,SalonerB,CunninghamCO,BarryCL.Medical
CannabisLawsandOpioidAnalgesicOverdoseMortalityintheUnitedStates,1999-2010.JAMAInternMed.2014;174(10):1668-1673.doi:10.1001/jamainternmed.2014.4005
MedicalCannabisLawsandOpioidAnalgesicOverdoseMortalityinTheUnitedStates1999-2010
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n Theendocannabinoidsystemisaninnatebiologicsystemresponsibleforregula>onofbodymul>plesystems
n Thereisclinicaldataontheuseofcannabistotreatsymptomsrelatedtoseriousmedicalcondi>ons
n Cannabismayprovidereliefforpa>entssufferingfromillnessordiseaseunrelievedbyothermodali>es
n Recommendingapa>entfortheprogramisprotectedunderstatelaw
Summary
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v TheuseofcannabishasaplaceinthetreatmentofCNCP
v TheuseofcannabismaydecreasetheuseofopioidmedicationinpatientswithCNCP
v Cannabishasafavorablesafetyprofile
Summary