Antiemetics

Question 1

What are the 4 classes of antiemetics ?

Answer 1

H1 receptor antagonist - the antihistamines. Work on receptors in the ear.

5HT3 receptor antagonist eg ondansotron. work at the chemoreceptor trigger zone?

d2 receptor antagonist eg metoclopramide, works at the chemoreceptor trigger zone.

Muscarinic receptor antagonist. Works on the vomiting centre.

Question 2

What antisickness is best for motion sickness

Answer 2

H1 receptor antagonist

Question 3

What antiemetics work on the chemoreceptor trigger zone ?

Answer 3

5 HT3
D2

Question 4

Name a type of 5HT3

Answer 4

Ondansetron

Question 5

Name a d2 receptor antagonist

Answer 5

metoclopramide

Question 6

Name a muscarnic receptor antagonist

Answer 6

hyoscine hydrobromide