Veterinary Pharmacology > Smalltest nr 3 > Flashcards

Smalltest nr 3 Flashcards

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1
Q

Painkilling list

A
  1. Opioids
  2. NSAIDS
  3. ⍺-2 agonists
  4. Antibodies against nerve growth factor
  5. Gabapentin
  6. Antidepressants
    + KETAMIN (NMDA receptor antagonist)
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2
Q

Gabapentin used for (indication)

A
  1. Anti epileptic
  2. Unique for NEUROPATHIC PAIN
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3
Q

What are the major pilars due to painkilling?

A
  1. Opioids
  2. NSAIDS
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4
Q

Name an NSAIDS agianst headache

A

ASPIRIN

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5
Q

What are the requirements for surgery

A

General Anaestesia

  1. Total unconsciousness
  2. Total muscle relaxation
  3. Total analgesia

NOT= ANALGESIA or NEUOROLEPTIC

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6
Q

What is balanced anesthesia?

A

Balanced anesthesia - GS reached with combinations of drugs
Eg. ⍺-2 agonists with:
1. KETAMIN
2. BUTORPHANOL = Opioid
3. XYLAZINE - Emesis induction - cat - Subsedative dose

Used for predemication, induction and wide maintenance

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7
Q

BUTORPHANOL
Type of drug

A

Opioid

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8
Q

KETAMIN
Type of drug

A

NMDA receptor antagonist

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9
Q

Opioids and analgesia?

A

VERY POTENT ANALGESIC

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10
Q

Higher dose of Xylazine or Detomidine cause analgesic effect?
True or false

A

True
The higher dose of Xylazine or detomine, the more POTENT analgesic effect of the ⍺-2 agonists substance!

Induces painkilling effect of the other substances.

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11
Q

What are the different tests performed to evaluate pain and pain perceptions?

A
  1. Tail flinch test
  2. Hot plate test
  3. “Sigmund” (Wrighting) test
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12
Q

Characterize the Tail flinch test

A
  1. Lab animals is used
  2. At least 2 groups.
    - One is placebo
  3. Focused infra red light
    - heat up tissue of tail = causes pain within seconds!
    - Mouse will pull away the tail.
  4. Measure the time
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13
Q

Characterize the Hot plate test

A
  1. Easier to measure than tail flinch test
  2. Hot plate heated to 54 degrees celsius
  3. Measure the time until mouse lift up its feets to lick its foot.
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14
Q

Tail flinch latency graph

A
  • Measure tailflinch with and withouth painkilling subst.
  • Administration route is important - IV or IM
    1. Using MORPHINE
    (GA, premedication or during maintenance)
  • Wait 20-30 min!! Time to reach morphines maximal painkilling activity! Before that not enough painkilling effect if you use MORPHINE alone as a painkiller.
  • In surgery, wait 20-30 min prior to cut the animal
  • Compared with the control group = Proove of painkilling effect! = By having morphine In the system, they can endure pain for more seconds (3 sec)
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15
Q

Characterize the WRIGHT (SIGMUND) test

A
  1. NO LONGER USED because of animal welfare
  2. Measure number of convulsions
  3. Use substance to induce pain (Algogenic, 1% acid)!
  4. Given IP = VERY PAINFUL
    - As PANCREATITIS!!! And PERITONITIS!!!
  5. Due to convulsions you will be able to detect a time dependent efficacy
  6. ⍺-2 agonists -> detomidine > xylazine in regards of potency, ↑dose = ↑ potency
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16
Q

Detomidine VS Xylazine due to convulsions and analgesic effect

A

DETOMIDINE is a more POTENT ANALGESIC, so less convulsions will be seen compared to Xylazine.

↑dose = ↑ potency

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17
Q

Druggroups used as premedications prior to GA

A
  1. PHENOTHIAZINES
  2. BUTYROPHENONES
  3. ⍺-2 AGONISTS
  4. BZD (BENZODIAZEPINES)
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18
Q

Name the Tranquilizer groups

A
  1. PHENOTHIAZINES
  2. BUTYROPHENONES
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19
Q

Characterize the TRANQULIZER drug group

A
  1. Used for Traveling
  2. Cause Sedation ONLY (Level of CNS depression)
  3. ↑dose = ↑ duration
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20
Q

Name the Sedatohypnotic drug groups

A
  1. ⍺-2 AGONISTS
  2. BZD (BENZODIAZEPINES)
  3. Phenobarbital=Barbiturates
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21
Q

Characterize the Sedatohypnotic drug group

A
  1. Not enough for surgery on its own
  2. ↑ High dose = Hypnosedation, Low dose = Sedation
    (level of CNS depression)
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22
Q

PHENOTHIAZINE
Drugs

A

= Tranquilizers
Acepromazine

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23
Q

BUTYROPHENONES
Drugs

A

= Tranqulizers
AZAPERONE
DROPERIDOL
FLUANISONE

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24
Q

Characterize the GA drug group

A
  1. Cause the debth enough of CNS depression to cause general anesthesia!
  2. Inhalations and Injections
  3. Elevation of dose on the graph indicates that it needs to be monitored => Danger of EUTHANASIA!
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25
⍺-2 AGONISTS Drugs
XYLAZINE DETOMIDINE MEDETOMIDINE DEXMEDETOMIDINE
26
2. BZD (BENZODIAZEPINES) Drugs
DIAZEPAM MIDAZOLAM (Alprazolam)
27
PHENOTHIAZINES (Acepromazine) Sedation
Yes + (++)
28
PHENOTHIAZINES (Acepromazine) Analgesia
No analgesic effect, however, it potentiates the analgesic effect of other drugs
29
PHENOTHIAZINES (Acepromazine) Administration route
IV, (IM) Po -\> bioavailability is unreliable (individual independent) Acepromazine NOT reliable ORALY Oral DOG and HORSES - for sedate for minor procedure or transport to practice - one will have an effect and other not
30
PHENOTHIAZINES (Acepromazine) Indication
1. Transportation (calming), 2. Premedication, 3. Neuroleptic-analgesia (NOT for GA) Acepromazine -\> used to fight histamin effect = antihistamine UNIQUE INDICATION (morphine cause histamine release, use acepromazine to avoid this) 4. Anti-emesis = anti vomit - motion sickness
31
PHENOTHIAZINES (Acepromazine) Side effects
1. Hypotension (⍺-1), 2. penile prolapse (eq), 3. 3rd eyelid prolapse (ca, fe), 3. ↑ Pseudopregnancy duration (ca), 4. Thermoregulation = lost (esp. acepromazine) 5. Tissue irritant 6. Can be paifull IM 7. In small animals - Decreased GI activity 8. Tympanism (ru)
32
PHENOTHIAZINES (Acepromazine) Contraindications
1. Dehydration (⍺-1 -\> hypotension), 2. history of epileptic seizures, advised not to use 3. Ulcers 4. ACEPROMAZINE NOT for BOXERS
33
BUTYROPHENONES Sedation
Yes + (++)
34
BUTYROPHENONES Analgesia
No analgesic effect, however, it potentiates the analgesic effect of other drugs - Slightly analgesic in comparance to acepromazine
35
BUTYROPHENONES Administration route
1. IM only (due to ⍺-1 agonist, it can cause hypotension so severe, that patient can collapse) 2. AZAPERONE - Swine - reduce stress traveling = ONLY ORAL
36
BUTYROPHENONES Indications
1. Transportation (calming), 2. premedication, 3. neuroleptic-analgesia (butyrophenones -\> combine with opioids -\> provides muscle relaxation, sedation & mild analgesia) = ONLY MINOR PROCEDURES not GA
37
What is Neuroleptic-analgesia
Tranquilizers + opioids Butyrphenones + opioids Especially used in EXOTIC ANIMALS
38
BUTYROPHENONES Sideeffects
1. Hypotension (⍺-1), 2. penile prolapse (eq), 3. 3rd eyelid prolapse (ca, fe), 4. increase pseudopregnancy duration (ca), 5. thermoregulation = lost (esp. acepromazine)
39
BUTYROPHENONES Contraindications
1. Dehydration (⍺-1 -\> hypotension), 2. History of epileptic seizures, 3. Butyrophenones have a LONG duration(halflife) =Ø use for transport! Not allowed for slaughter-transport?
40
Indication Droperidol Fluanisone
Other than sedation due to examination or transport (tranquilizers) Used as premedication prior to surgery
41
⍺-2 AGONISTS Sedation
Yes +++
42
⍺-2 AGONISTS Analgesia
+++ Yes
43
⍺-2 AGONISTS From least -\> most selective meaning
1. Xylazine 2. Detomidine 3. Medetomidine 4. Dexmedetomidine Meaning that: 1. Xylazine is the least selective = most side-effects 2. Dexmedetomidine is the most selective = least side-effect and is also alowed in cardiac patients.
44
⍺-2 AGONISTS Administration Route
IM, IV Po -\> no swallowing!! Absorption via buccal application (gel) - DEXMEDATOMIDINE (Ca, Fe)
45
⍺-2 AGONISTS Indications
1. Alone -\> minor procedures (e. g. ear cleaning, wound bandaging) 2. Combo -\> e.g. with ketamine -\> balanced anaesthesia Fe -\> xylazine = emesis (subhypnotic dose) Combination to later perform GA
46
⍺-2 AGONISTS Side effects
1. Vomiting, emesis, 2. SIDE effects due to ⍺-1 agonism -\> Ø heart failure patients (dexmedetomidine can be used in heart failure patients), --\> Ø diabetic patients because it can increase glucose blood levels Sideeffects depending on the SENSITIVITY of the ⍺1 or ⍺2 receptor
47
⍺-2 AGONISTS Contraindications
Cardiac failure patients, diabetic patients (dexmedetomidine can be used in heart failure patients),
48
BDZ Sedation
(Diazepam, midazolam) Yes, + Depending on the dose and indication
49
BDZ Analgesia
(Diazepam, midazolam) No ---
50
BDZ Administration rout
IV Intranasally, IV, rectally IM -\> not reliable for diazepam (midazolam IM absorption is good enough) Po -\> alprazolam (xanax; used for phonophobia (ca)
51
BDZ Indications
1. Premedication, 2. sedation & hypnosis, 3. anticonvulsant (status epilepsy), fe-\> diazepam is used to increase appetite (short term, because it can cause irreversible liver damage) Not longer than 5-7 days!
52
BDZ Side effects
Hepatotoxic, weight gain
53
BDZ Contraindication
Fe & usage of diazepam
54
Phenobarbital Sedation
No -
55
Phenobarbital Analgesia
No - -
56
Phenobarbital Administration route
Po, maybe IV
57
Phenobarbital Indications
Long term management of epilepsy
58
Phenobarbital Side effects
1. Weight gain, 2. hepatotoxic, 3. CYP450 inducer!! (speeds up the metabolism of itself and other drugs metabolized by cytochrome enzymes =\> increase the dose)
59
Phenobarbital contraindications
Not 1st choice in liver failure patients
60
Morphine, fentanyl Category
Full agonist
61
Morphine, fentanyl Analgesic potency
+++
62
Morphine, fentanyl Sedation
++
63
Morphine, Duration of action
Morphine - 3-4 hrs Give continuous rate infusion (can govern anesthesia a lot safer)
64
Fentanyl Duration of action
Fentanyl - bolus = 20-30 min Give continuous rate infusion (can govern anesthesia a lot safer) For injectable anaesthesia - fentanyl
65
Morphine, fentanyl Side effects
1. Respiratory depression, 2. emesis, (depends on the drug) 3. histamine release (acepromazine use to counter this), 4. anti-diarrhea, - apomorphine (eyedrops, SC) -\> very strong emesis effects… wear gloves or wash hands STORY, injections
66
Use of bolus in such as fentanyl
Bolus -\> the administration of an amount of drug given at once (for fentanyl, must then readminister every 20 min)
67
Drugs belonging to OPIOIDS
1. Morphine 2. Fentanyl 3. Tramadol 4. Buphrenorphine 5. Butorphanol
68
Indication of opioids
1. Pain killing effect 2. Used for its side effects - Emesis = APOMORPHINE - Anti-diarrhoea = LOPERAMIDE
69
Drug used to induce emesis
APOMORPHINE
70
Drug used for anti-diarrhoea
LOPERAMIDE
71
Tramadol Category
Partial Agonist
72
Tramadol Sedation
No - (however, long term Po, the patient can appear sedated)
73
Tramadol Analgesic potency
+
74
Tramadol Duration of action
6-8 hours
75
Tramadol Side effects
1. Respiratory depression, 2. emesis, 3. histamine release (acepromazine use to counter this), 4. anti-diarrhoea, apomorphine (eyedrops, SC) -\> very strong emesis effects… wear gloves or wash hands
76
Buprenorphine Category
Partial agonist
77
Buprenorphine Analgesic potency
++
78
Buprenorphine Sedation
+ (dependent on dose & individual) Moderatly
79
Buprenorphine Duration of action
6-8 hrs (can be up to 12 hrs) = Half a day BID 1st choice in case of PANCREATITIS = Because NSAIDS is not allowed
80
ButorPhanol Category
Partial agonist
81
Butorphanol Analgesic potency
+
82
Butorphanol Sedation
+ (dependent on dose & individual) Moderate
83
Butorphanol Duration of action
3-4 hrs
84
Butorphanol Side effects
1. Respiratory depression, 2. emesis, 3. histamine release (acepromazine use to counter this), 4. anti-diarrhoea, apomorphine (eyedrops, SC) -\> very strong emesis effects… wear gloves or wash hands
85
Due to analgesic potency in which order does the mentioned opioids come in
1. Morphine, Fentanyl 2. Buprenorphine 3. Tramadol/Butorphanol
86
Situation task I. Dog with heartworm disease 5 years old, slightly decompensated heart failure Melarsomine: sedation-analgesia necessary What should we give?
Keywords: 1. Heartworm disease, 2. Slightly Decompensated heart failure With heartworm disease, there are 2 ways to administer medicine: A) slow; B) complex therapy (fast) -\> use when patient has decompensated heart failure MELARSOMIDE (immiticide) -\> sedation-analgesia is necessary (it is very painful!) What to give? Benzodiazepine & opioids (combined)
87
When do we use the complex (fast theraphy) in case of heart worm disease?
use when patient has decompensated heart failure
88
When performing complex (fast) therapy in case of Heartworm disease, which drug is used?
MELARSOMIDE (immiticide) = Arsenic compound - \> sedation-analgesia is necessary (it is very painful!) - \> Given IM into Lumbar Muscle - \> While Sedated
89
What to give together with the painful MELARSOMIDE (immiticide) ?
No need for general anesthesia BENZODIAZEPINE(BZD) & OPIOIDS (combined) -\> sedation-analgesia is necessary because MELARSOMIDE is really painful
90
Situation task II. Dog with severe trauma Stabile general condition (3 years old, no known disease) Amputation inevitable Which drugs should we use for premedication?
1. Phenothiazine 2. ⍺-2 agonist 3. Benzodiazepines 4. Ketamine 5. Lidocaine
91
Situation task II. Dog with severe trauma Stabile general condition (3 years old, no known disease) Amputation inevitable Which drugs should we use for premedication? WHY do we use them?
1. Phenothiazine - \> potentiate the analgesic effect - \> Acepromazine 2. ⍺-2 agonist - \> increase painkilling efficacy 3. Benzodiazepines - \> can prevent pre & post-anesthesia excitement - \> Used as premedication as well 4. Ketamine -\> IV & has an analgesic effect (NMDAr antagonist), given at continuous rate (at subanesthetic dose), decreases sensitization of pain = Injectable anesthetic with IMPORTANT ANALGESIC effect 5. Lidocaine - \> local anesthetic, use around nerve where you’re going to cut the leg off
92
Why does pre and post narcotic excitation happen?
During General Anesthesia - pre and post excitatation can happen depending on the individual, the drug, and the combination of the drug
93
How to avoid pre and post narcotic excitation?
Mostly we can avoid this pre and post narcotic excitation. Prevented mostly by Benzodiazepines..
94
Characterize KETAMIN
Decrease the sensitization to pain Act on the NMDA receptor Used in combination with ⍺-2 agonist in order to perform balanced anesthesia
95
Which type of drug cannot be used in diabetic patients
⍺-2 agonists Because it can increase blood glucose level
96
Which type of drug cannot be used in cardiac failure patients? With the exception of one drug.
⍺-2 agonist Dexmedetomidine can be used in heart failure patients (gel-buccal)
97
Sideeffects of the ⍺-2 agonist depend on
The sensitivity of the ⍺1 and ⍺2 receptor
Veterinary Pharmacology
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