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Samenvatting Farmacologie - Prof. Jan de Hoon, Prof. Minne Casteels

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Deze samenvatting behandelt de volledige stof voor Farmacologie in de Bachelor Geneeskunde aan KU Leuven. Het document omvat farmacokinetiek (absorptie, distributie, eliminatie), farmacodynamiek, toedieningsvormen, en speciale aandachtspunten zoals farmacotherapie bij risicopopulaties en acute intoxicaties. Het document is gebaseerd op de cursus en notities/slidese uit de lessen. Ideaal voor examenvoorbereiding - alle kernconcepten zijn overzichtelijk gestructureerd met duidelijke onderverdeling per onderwerp.

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Inhoudsopgave
Deel 1: Inleiding tot de farmacologie en begrippen van farmacokinetiek (pak slides erbij!) ..........8
Inleiding & terminologie .......................................................................................................8
1. Absorptie: transport v farmaca over biologische membranen.........................................8
Mechanismen bij de opname van stoffen over biologische membranen ..............................9
Mechanismen die de opname van stoffen over membranen beïnvloeden ......................... 11
Opname vanuit het gastro-intestinaalstelsel: interfererende factoren............................... 12
2. Verdeling of distributie ............................................................................................... 14
Distributievolume ........................................................................................................... 14
Waarvan is het distributievolume afhankelijk? ................................................................. 15
Enkele bijzondere weefsels met betrekking tot distributie ................................................ 17
3. Eliminatie .................................................................................................................. 17
Biotransformatie ............................................................................................................ 18
Renale klaring ................................................................................................................ 24
Andere excretiewegen .................................................................................................... 25
4. Farmacokinetiek ........................................................................................................ 26
Eenmalige intraveneuze toediening ................................................................................. 27
Eenmalige extra-vasculaire toediening ............................................................................ 29
Herhaalde toediening ..................................................................................................... 31
Continu intraveneus infuus ............................................................................................. 32
Het doseringsschema en het therapeutisch venster ......................................................... 32
Plasmaspiegelbepalingen ............................................................................................... 33
Niet-lineaire kinetiek ...................................................................................................... 34
Stereoselectieve farmacokinetiek ................................................................................... 34
5. Farmacodynamiek ..................................................................................................... 35
Farmacologische effecten op moleculair niveau .............................................................. 35
Farmacologische effecten op orgaan niveau: de concentratie-effect curve ....................... 36
Farmacologische effecten in een organisme of populatie: de dosis-effect curve ............... 39
Biofarmaceutische innovaties ......................................................................................... 42
6. Toedieningsvormen .................................................................................................... 43
Enterale inname ............................................................................................................. 43
Parenteraal .................................................................................................................... 45
7. Farmacotherapie bij risicopopulaties.......................................................................... 47
Farmacotherapie bij extreme leeftijden ........................................................................... 47
Farmacotherapie tijdens conceptie, zwangerschap en borstvoeding ................................ 49

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, Farmacotherapie en co-morbiditeit: nier- en leverlijden als voorbeelden .......................... 51
8. Acute intoxicaties ...................................................................................................... 52
Algemene principes ........................................................................................................ 52
Ondersteunende therapie ............................................................................................... 53
Verwijderen van nog niet geabsorbeerde stof ................................................................... 54
Versnellen van de eliminatie ........................................................................................... 55
Identificatie van het oorzakelijk toxine ............................................................................. 56
Specifieke antidota......................................................................................................... 56
De comateuze patiënt .................................................................................................... 57
Homeopathie en plantengeneesmiddelen → slides .............................................................. 57
Hoest OTC (over the counter) → bijlage ................................................................................ 58
Regelgeving → bijlage + slides ............................................................................................. 58
Farmacovigilantie → slides + bijlage.................................................................................... 61
Antibiotica → bijlage ........................................................................................................... 65
Deel 2: Transmissie in het perifeer en autonoom zenuwstelsel ................................................ 67
Inleiding ............................................................................................................................ 67
1. Cholinerge transmissie .............................................................................................. 69
Anatomie ....................................................................................................................... 69
Synthese, vrijzetting en afbraak van acetylcholine............................................................ 69
Cholinerge receptoren .................................................................................................... 70
Activatie cholinerge transmissie...................................................................................... 71
Inhibitie van cholinerge neurotransmissie ....................................................................... 75
Klein overzicht ................................................................................................................ 80
Toepassing 1: cannabis, alcohol, ectasy, cocaïne ............................................................ 80
Toepassing 2: glaucoom ................................................................................................. 84
Toepassing 3: behandeling van luizen, teken, schurft ....................................................... 85
2. Adrenerge transmissie ............................................................................................... 86
Anatomie ....................................................................................................................... 86
Synthese, vrijzetting, heropname van noradrenaline en adrenaline ................................... 86
Verwijdering en afbraak van noradrenaline ...................................................................... 87
Receptoren .................................................................................................................... 88
Activatie van adrenerge transmissie door direct werkende sympathomimetica (agonisten
van α- en β-receptoren) .................................................................................................. 89
Activatie van adrenerge transmissie door indirect-werkende sympathomimetica .............. 96
Inhibitie van adrenerge transmissie ................................................................................. 97
Toepassing 4: geneesmiddelen gebruikt bij obesitas en centrale stimulantia .................. 103

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, 3. Dopaminerge transmissie ........................................................................................ 105
Anatomie ..................................................................................................................... 105
Synthese, vrijzetting, heropname en afbraak van dopamine ........................................... 105
Receptoren .................................................................................................................. 106
Activatie van dopaminerge transmissie ......................................................................... 106
Inhibitie van dopaminerge transmissie .......................................................................... 106
4. Serotonerge transmissie .......................................................................................... 107
Anatomie ..................................................................................................................... 107
Receptoren .................................................................................................................. 107
Synthese, vrijzetting, heropname en afbraak van serotonine .......................................... 107
Activatie van serotonerge transmissie ........................................................................... 108
Inhibitie van serotonerge transmissie ............................................................................ 110
Deel 3: Geneesmiddelen die inwerken op het centraal zenuwstelsel ..................................... 111
1. Farmacotherapie van Depressie ............................................................................... 111
Definitie ....................................................................................................................... 111
Socio-economische aspecten van depressie ................................................................ 111
De neurobiologische oorzaak van depressie .................................................................. 111
Indeling en structuur van antidepressiva ....................................................................... 113
Indicaties en bijzondere aspecten van de behandeling ................................................... 118
2. Farmacotherapie van psychose en manie: antipyschotica en lithium ......................... 120
Inleiding ....................................................................................................................... 120
Antipsychotica ............................................................................................................. 124
Bipolaire stoornis ......................................................................................................... 129
3. Farmacotherapie van epilepsie................................................................................. 134
Inleiding ....................................................................................................................... 134
Werkingsmechanisme anti-epileptica ........................................................................... 135
Chemische structuur anti-epileptica ............................................................................. 136
Anti-epileptica die werken via een blokkering van Na+-kanalen ...................................... 137
Anti-epileptica die werken via GABA .............................................................................. 142
Ca kanaal blokkers (slaan we over) ................................................................................ 144
Andere anti-epileptica .................................................................................................. 144
Algemene bemerkingen ................................................................................................ 145
Bijkomende indicaties van anti-epileptica ..................................................................... 146
4. Farmacotherapie van de ziekte van Parkinson en Parkinsonisme ............................... 146
Parkinsonisme: klinisch syndroom ................................................................................ 146
Geneesmiddelen gebruikt bij de ziekte van Parkinson en Parkinsonisme ........................ 147

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, 5. Farmacotherapie van andere bewegingsstoornissen ................................................. 152
6. Skeletspierrelaxantia ............................................................................................... 153
Stoffen die inwerken op het CZS .................................................................................... 154
Stoffen die inwerken op het spierweefsel ....................................................................... 155
Stoffen die inwerken thv synaps .................................................................................... 155
Nieuwe therapeutische targets SMA .............................................................................. 156
7. Farmacotherapie van die ziekte van Alzheimer .......................................................... 156
Inleiding ....................................................................................................................... 156
Neurobiologisch mechanisme bij de ziekte van Alzheimer en mogelijke therapeutische
targets ......................................................................................................................... 156
AchE-inhibitoren .......................................................................................................... 157
NMDA-antagonist: memantine...................................................................................... 158
Dementie ..................................................................................................................... 158
8. Farmacotherapie van pijn ......................................................................................... 159
Inleiding ....................................................................................................................... 159
Opioïde analgetica ....................................................................................................... 161
Farmacotherapie van (kanker)pijn ................................................................................. 172
Lokale anesthetica ....................................................................................................... 172
Atypische analgetica: heterogene groep ........................................................................ 175
Neuropatische pijn ....................................................................................................... 175
9. Hypnotica - Anxiolytica ............................................................................................ 176
Inleiding ....................................................................................................................... 176
Benzodiazepines .......................................................................................................... 177
Stoffen met werking analoog aan deze van benzo’s (Z-drugs) .......................................... 185
Benzodiazepine-antagonist (flumazenil) ........................................................................ 186
β-blokkers .................................................................................................................... 186
Histamine H1-receptorblokkers .................................................................................... 186
Antidepressiva ............................................................................................................. 186
Fytotherapeutica .......................................................................................................... 187
Melatonine ................................................................................................................... 187
Barbituraten ................................................................................................................. 188
Deel 4: Geneesmiddelen in verband met het cardiovasculair stelsel...................................... 189
1. Diuretica ................................................................................................................. 189
Koolzuuranhydrase-inhibitoren ..................................................................................... 189
Thiaziden ..................................................................................................................... 191
Lisdiuretica (furosemide) .............................................................................................. 193

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