Gastric and Duodenal Ulceration Flashcards Preview

BNF Chapter 1 - GI > Gastric and Duodenal Ulceration > Flashcards

Flashcards in Gastric and Duodenal Ulceration Deck (15)
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1
Q

If duodenal and gastric ulcers are not cause by NSAID use, what are they likely caused by?

A

H. pylori.

2
Q

What should be confirmed before starting treatment for gastric or duodenal ulceration?

A

H. pylori infection.

3
Q

What is the initial, one-week therapy which is used for the eradication of H. pylori?

A

Triple therapy with a PPI, clarithromycin and either amoxicillin or metronidazole.

4
Q

What are the disadvantages of two-week triple therapy and two-week dual therapy for H. pylori eradication?

A

Two-week triple therapy is associated with higher side effects and lower compliance. Two-week dual therapy produces lower eradication rates.

5
Q

What is the first step to be taken when a patient presents with an NSAID-induced ulcer?

A

The NSAID should be withdrawn.

6
Q

What factors may increase a patient’s risk of developing an NSAID-induced ulcer?

A

Those aged over 65 years, those with a history of GI ulceration, other GI complications, serious comorbidities (CVD, diabetes, renal or hepatic impairment).

7
Q

In patients at risk of GI ulceration with NSAID use, what other drugs can be given to reduce the risk?

A

PPI is first choice. H2 receptor antagonists or misoprostol can be considered as alternatives.

8
Q

What may limit the dose of misoprostol, used for gastroprotection in NSAID use?

A

Colic and diarrhoea.

9
Q

Give some examples of drugs which chelate and form ulcer-protecting complexes, used in gastric and duodenal ulceration.

A

Sucralfate, peptobismol, triopotassium, dicitratobismuthate.

10
Q

Give some examples of H2 receptor antagonists.

A

Ranitidine, famotidine, cimetidine, nizatidine.

11
Q

How do H2 antagonists’ work?

A

Reduce gastric acid output through histamine H2-receptor blockade.

12
Q

Give some examples of PPIs.

A

Lansoprazole, omeprazole, rabeprazole.

13
Q

How do PPIs work?

A

Inhibit gastric acid secretion by blocking the hydrogen pump of the gastric parietal cells.

14
Q

What is one of the main risks associated with sucralfate use?

A

Bezoar formation - the risk of indigestible material accumulating in the GIT.

15
Q

Due to the risk of bezoar formation, in which patient groups should sucralfate be used with caution?

A

The seriously ill, patients receiving enteral feeds, those with delayed gastric emptying.