Anticholinergics Flashcards Preview

Surgery & Anaesthesia - NSULA Vet Tech Program Spring 2016 > Anticholinergics > Flashcards

Flashcards in Anticholinergics Deck (19):
1

preanesthetic agent

drugs administered prior to drugs which induce general anesthesia

2

How do anticholinergics (parasympatholytics) affect the body?

blocks action of acetylcholine at muscarinic receptors of parasympathetic nervous system

3

What areas of the body are controlled by the parasympathetic nervous system?

heart, GI tract, bronchi, several secretory glands including salivary and tear glands, iris of the eye

4

What are two anticholenergic drugs?

atropine sulfate, glycopyrrolate

5

How is atropine sulfate administered?

SQ, IM or IV (emergencies)

6

What is the recommended dosage of atropine sulfate?

0.02 mg/lb for dogs, cats, and pigs

7

What species is atropine sulfate generally not given to?

horses, ruminants

8

What is the duration of action of atropine sulfate?

90 minutes

9

How is glycopyrrolate administered?

SQ, IM or IV (for emergencies)

10

What is the dosage of glycopyrrolate?

0.005 mg/lb

11

What is the duration of glycopyrrolate?

2-4 hours

12

What is the advantage of glycopyrrolate over other anticholinergic drugs?

it doesn't cross the blood-brain or placental barrier

13

What is the disadvantage of glycopyrrolate over other anticholinergic drugs?

cost

14

What are possible reasons for using anticholinergics?

dry salivary secretions, prevent bradyardia from vagal stimulation, or increase heart rate

15

What effect do all modern gas anaeshtetics share?

they all increase parasympathetic effects

16

What are some other effects of anticholinergic drugs?

dialate pupils especially in cats, decrease tear production, decrease intestinal motility, increase bronchodialation (and thus dead space)

17

What may anticholenergic drugs cause in horses and ruminants

it may need to colic in horses or bloat in ruminants

18

What are some contraindications for anticholinergic use?

preexisting tachycardia, cardiovascular disease, constipation or ilius

19

What are some side effects of anticholinergic drugs?

may cause initial bradycardia (IV route), cardiac arrhythmias, colic/bloat, cns depression (atropine)