GI system Flashcards

1
Q

Name the classifications of GI tract drugs

A
  • Drugs influencing appetite
  • Drugs influencing gastric secretion
  • Drugs affecting gastric motility
  • Drugs influencing pancreatic secretion
  • Drugs affecting intestinal motility
  • Drugs for hepatobiliary disorders
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2
Q

Name the classifications of drugs affecting the appetite

A

A . Stimulants of appetite (Appetizers)

      - Bitters  2. Hormonal preparations 
      - Insulin 

B. Suppressors of appetite (Anorexigens)

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3
Q

Which drug should be applied in case cachexia

A
  • Insulin
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4
Q

Which condition is treated with anorexigens

A
  • Obesity
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5
Q

What group of drugs is contraindicated for peptic ulcers?

A
  • NSAIDS
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6
Q

Name 2 possible causes of peptic ulcers(stomach and duodenum)

A
  • NSAIDS

- Gastritis

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7
Q

Name a possible reason for a duodenal peptic ulcer

A
  • Excessive secretion of gastric acid
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8
Q

Name a cause for gastritis

A
  • H. Pylori
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9
Q

Name a cause for hyposectretion of acid

A
  • Gastritis in the body of the stomach => atrophic gastritis => hyopsectretion of stomach acid => gastric ulcer
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10
Q

Name the classifications of stimulants of gastric secretion and their drugs

A

A . Stimulants of gastric secretion

  • Histamine
  • Bitters

B. Drugs for replacement therapy

  • Pepsin
  • Hydrochloric acid
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11
Q

Name the use of stimulants of gastric secretion

A

To produce enough acid to digest food so it wont damage the stomach wall and create an ulcer

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12
Q

Name the classifications of surpressors of gastric sectretion and their drugs

A
  1. M-cholinoblockers (antagonists)
    - Pirezepine
  2. H2-histamine receptor blockers
    - Ranitidine
    - Famotidine
  3. Inhibitors of proton pump
    - Omeprazole
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13
Q

MOA of omeprazol

A
  • Inhibits Na+, K+-ATPase (proton pump)

necessary for transport of H+ from parietal cells of gastric mucous membrane lumen of stomach

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14
Q

Indications for omeprazol

A
  • Peptic ulcer disease
  • Gasatroesophagal reflux disease
  • Chronic gastritis with the hypersecretion of acid
  • Zolinger-Ellison syndrome
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15
Q

Side effects of omeprazol

A
  • Naussea, diarrhea, constipation, meteorism, pain in the stomach
  • Headache, weakness, depression, vision distrurbance
  • Skin rash
  • Arthralgia, myalgia, eosinophilia
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16
Q

contraindications of omeprazol

A
  • pregnancy
  • lactation
  • childhood
  • Severe hepatic disease
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17
Q

pharmacokinetics of rantidine

A
  • administered orally, IM, IV
  • well absorped via GI tract
  • acts within 15 mins, works 8-12 hours
  • excreted via urine in 24 hrs
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18
Q

pharmacokinetics of omeprazol

A
  • administered orally, IV, IV infusion
  • absorped via small intestines
  • acts within 60 mins, works more then 24 hrs
  • metabolized in liver
  • excreted via urine & feces
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19
Q

MOA of ranitidine

A
  • Inhibits H2-histamine receptors in parietal cells of the gastric mucous membrane
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20
Q

pharmacodynamics of ranitidine

A
  • Inhibition of gastric secretion
  • Decrease in total volume of gastric juice
  • Decrease in pepsin activity
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21
Q

indications of ranitidine

A
  • Peptic ulcer disease
  • Reflux-esophagitis
  • Zolinger-Ellison syndrome bleeding from the upper regions of the GI tract
  • The prophylaxis of bleeding in patients suffering from peptic ulcer
  • The prophylaxis of gastric juice aspiration in surgery under general anesthesia.
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22
Q

side effects of ranitidine

A
  • Headache, virtigo
  • Skin rash
  • Increase of plasma concentration of hepatic enzymes
  • Thrombocytopenia
  • Hypersensitivity
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23
Q

Contraindications for rantidine

A
  • pregnancy
  • lactation
  • childhood
  • Severe renal and hepatic diseases
  • Gastric malignancy
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24
Q

Which M-cholinoblockers are used as antisecretory agents

A
  • Pirenzepine

- Atropine

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25
Q

What are antacids?

A
  • preparations for acid neutralization.

- Antacids are absorbable (NaHC03) and non-absorbable (CaC03, Mg(OH)2, Al(OH)3

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26
Q

Name 3 antacids

A
  • Sodium bicarbonate
  • Magnesium Oxide
  • Aluminum hydroxide
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27
Q

Name 2 combined antacids

A
  • Almagel

- Maalox

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28
Q

What are gastroprotectors and what do they do?

A
  • Drugs that cover the stomach with a protective layer to prevent damage
  • Ulcer healing
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29
Q

Name 2 gastroprotectors

A
  • Sucralfate

- Bismuth subcitrate

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30
Q

Name an enhanced mucosal resistance drug

A
  • Misoprostol
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31
Q

MOA of Bismuth nitrate

A
  • forms a protective cover on the surface of ulcers and erosions
  • stimulates regeneration by the accumulation of an epidermal growth factor
  • increases prostaglandin E, synthesis
  • promotes the production of mucus and bicarbonates
  • inhibits the activity of pepsin
  • has an anti-helicobacter action
32
Q

Indications for Bismuth nitrate

A
  • peptic ulcer disease
  • chronic gastritis
  • peptic ulcers caused by NSAIDs
  • functional dyspepsia. The drug has no significant side-effects
33
Q

Side effects of Bismuth nitrate

A
  • black discoloration of feces
  • rarely nausea
  • vomiting
  • diarrhea
  • rash
34
Q

MOA of Misoprostol

A
  • semisynthetic prostaglandin
  • binds to Pg receptors
  • promotes mucus production and inhibits acid secretion
  • improves the trophy of the gastric mucous membrane
35
Q

Side effects of Misoprostol

A
  • diarrhea

- the risk of precipitating contractions of the gravid uterus

36
Q

Which drugs are listed as replacement therapy in excretory malfunction of the pancreas?

A
  • Pancreatin
  • Panzinorm forte
  • Festal
  • Mezim forte
  • Creon
37
Q

Indication of excretory malfunction replacement therapy drugs

A
  • Chronic pancreatitis
38
Q

Clinical uses of excretory malfunction replacement therapy drugs

A

To replace the enzymes necessary fro the digestion of proteins fats and carbohydrates(creatorrhea, steatorrhea)

39
Q

Which drugs are listed as antienzymatic/anitprotease drugs?

A
  • Aprotinin/contrycal

- Aminocaproic acid

40
Q

Indications of antienzymatic/antiprotease drugs

A
  • pancreatitis

- pancreanecrosis

41
Q

MOA of antienzymatic/antiprotease drugs

A
  • directly acting inhibitors of proteolysis and fybrinolisis
42
Q

Name the drugs listed as bile drugs/choleretics

A
  • Allochol

- Cholenzym

43
Q

Indications for choleretics

A
  • Cholecystitis

- Cholelythiasis

44
Q

clinical uses of choleretics

A
  • stimulate the production and secretion of dilute bile fluid
45
Q

Name an enhancer drug for bile flow

A
  • Magnesium sulfate
46
Q

Name the listed cholespasmolytics

A
  • Atropine

- Drotaverine/No-spa

47
Q

Name the listed hepatoprotectors

A
  • Legalon
  • Darcyl
  • Essentiale
  • Gepabene
  • Thiotriazolin
48
Q

Name the listed cholelitholytic agents

A
  • Chenodeoxycholic/chenofalk

- Ursodeoxycholic acid/ursofalk

49
Q

What are hepatoprotectors?

A
  • preparations protecting hepatocytes from different aggressive factors
50
Q

What are cholelitholytics?

A

-

51
Q

Which group of drugs stimulate motility of the stomach and intestine?

A
  • M-cholinomimetics

- acetylcholinesterase inhibitors

52
Q

Name the listed M-cholinomimetic

A

Neostigmine/ Proserine

53
Q

Name the listed antagonists of dopamine and serotonin receptors

A
  • Domperidone/ Motillium

- Metoclopramide/ Cerucal

54
Q

Name a centrally acting emetic

A
  • Apomorphine
55
Q

MOA of Apomorphine

A
  • stimulant of CTZ and vomiting center.

- Apomorphine is centrally acting drug, a D2-dopamine receptor agonist. It is used in acute poisonings

56
Q

The pharmacological management of disturbances of intestinal motility includes

A
  • use of laxatives (purgatives) to treat constipation
  • use of antidiarrheal drugs (opioids, adsorbents, astringents) to treat non-infectious diarrhea
  • use of antimicrobial drugs to treat diarrhea caused by infection
  • application of cholinoblockers and myotropic spasmolytics to treat spasticity in the gut
57
Q

MOA of metoclopramide

A
  • is a specific blocker of D2 dopamine receptors.
  • it is 5-HT3-antagonist
  • it inhibits chemoreceptors of the trigger zone
  • the drug inhibits the sensitivity of visceral nerves translating impulses from the pylorus and duodenum to the emetic center
58
Q

Pharmacokinetics of metoclopramide

A
  • a decrease in vomiting and nausea
  • an increase in the tone of the stomach and intestine
  • the promotion of gastric evacuation
  • the prevention of a esophagal and pyloric reflux
  • the stimulation of intestinal peristalsis
  • the normalization of the tone of the bile bladder and bile secretion
  • the stimulation of prolactin secretion
59
Q

Indications of metoclopramide

A
  • vomiting and nausea of different origin
  • disturbances of the gut motility in dyspepsia, reflux-esophagitis, gastro- duodenitis, peptic ulcer, meteorism, and postoperative atonia ofthe stomach and intestine
  • x-ray investigations of the gut.
60
Q

Side effects of metoclopramide

A
  • Constipation, diarrhea & drymouth
  • weakness, headache,, depression, akatasia, extrapyramidal disturbances in children
  • parkinsonism
  • spasm of the face
61
Q

Contraindication of metoclopramide

A
  • hypersensitivity
  • GI bleeding
  • Bowel occlusion
  • Ulcer formation
  • abdominal surgeries
  • pregnancy
  • extra pyramidal disorder
  • epilepsia
  • childhood
  • severe renal and hepatic failure
62
Q

What is the pharmokinetics in laxatives

A
  • promote and facilitate bowel evacuation by acting locally to stimulate intestinal peristalsis or to soften bowel contents
63
Q

Name the listed laxatives classification

A
  • saline laxatives
  • laxatives containing antraglycosides
  • vegetable oils
  • synthetic laxatives
64
Q

Name the saline laxative

A
  • Magnesium Sulfate
65
Q

Name the laxative containing anthraglycosides

A
  • Senadexin
66
Q

Name the synthetic laxatives

A
  • Sodium picosulfate/ Guttalax
  • Bisacodyl
  • Lactulose/ Duphalac
  • Combined => Cafiol + Regulax
67
Q

MOA of laxatives

A
  • promote evacuation of the bowel through stimulation of fluid and electrolyte transport or increases in propulsive motility
68
Q

Drugs that surpress stomach motility

A
  • cholinergic blockers => atropine
69
Q

MOA surpressing durgs for stomach motility

A
  • eliminate smooth muscle spasms by blocking cholinergic receptors
70
Q

Name the Spasmolytic drugs

A
  • drotaverine/ no-spa

- combinations => Baralgin & Spazgan

71
Q

What are the indications for antiemetics

A
  • vomiting
  • naussea
  • motion sickness
72
Q

Name the listed antiemtic

A
  • benzocaine
73
Q

What is the purpose of taking anti-diarrheal drugs?

A
  • relieving symptoms of diarrhea
74
Q

Name the listed anti-diarrheal drug

A
  • Loperamide/ Imodium
75
Q

What are anti-flatulant agents?

A
  • drug used for the alleviation or prevention of excessive intestinal gas
76
Q

Name the listed anti-flatulant drugs

A
  • Peppermint
  • Simethicone/ Espumisan
  • Chamomile
77
Q

Effects of anti-flatulant drugs

A
  • preventing gas
    > enzyme-based dietary supplements break down indigestible substances and prevent substances from reaching large intestine intact
  • relieving gas
    > agent will coalesce smaller gas bubbles into larger bubbles, making release of gas within the gastrointestinal tract easy via burping or flatulence