Antihistamines

Question 1

Which antihistamines are H1 receptor blockers?

Answer 1

Diphenhydramine
Cetirizine
Chlorpheniramine
Cyclizine
Hydroxyzine
Loratadine
Fexofenadine

Question 2

Which antihistamines are H2 receptor blockers?

Answer 2

Cimetidine
Ranitidine

Question 3

Which blockers are used for allergic conditions?

Answer 3

H1

Question 4

Which blockers are used for excess stomach acid?

Answer 4

H2

Question 5

Which antihistamines are first generation?

Answer 5

Diphenhydramine
Promethazine
Hydroxyzine
Chlorpheniramine
Cyproheptadine
Cyclizine
Ketotifen

Question 6

Which antihistamines are second generation?

Answer 6

Loratadine
Cetirizine
Fexofenadine
Acrivastine

Question 7

Why are antihistamines useful in psychiatry?

Answer 7

1st gen Can cross BBB and have
anticholinergic properties
Makes them useful in EPSEs

Question 8

What are contraindications for first generation antihistamines?

Answer 8

BPH due to anticholinergic properties
angle closure glaucoma
pyloric stenosis