GI system Flashcards
Name the classifications of GI tract drugs
- Drugs influencing appetite
- Drugs influencing gastric secretion
- Drugs affecting gastric motility
- Drugs influencing pancreatic secretion
- Drugs affecting intestinal motility
- Drugs for hepatobiliary disorders
Name the classifications of drugs affecting the appetite
A . Stimulants of appetite (Appetizers)
- Bitters 2. Hormonal preparations - Insulin
B. Suppressors of appetite (Anorexigens)
Which drug should be applied in case cachexia
- Insulin
Which condition is treated with anorexigens
- Obesity
What group of drugs is contraindicated for peptic ulcers?
- NSAIDS
Name 2 possible causes of peptic ulcers(stomach and duodenum)
- NSAIDS
- Gastritis
Name a possible reason for a duodenal peptic ulcer
- Excessive secretion of gastric acid
Name a cause for gastritis
- H. Pylori
Name a cause for hyposectretion of acid
- Gastritis in the body of the stomach => atrophic gastritis => hyopsectretion of stomach acid => gastric ulcer
Name the classifications of stimulants of gastric secretion and their drugs
A . Stimulants of gastric secretion
- Histamine
- Bitters
B. Drugs for replacement therapy
- Pepsin
- Hydrochloric acid
Name the use of stimulants of gastric secretion
To produce enough acid to digest food so it wont damage the stomach wall and create an ulcer
Name the classifications of surpressors of gastric sectretion and their drugs
- M-cholinoblockers (antagonists)
- Pirezepine - H2-histamine receptor blockers
- Ranitidine
- Famotidine - Inhibitors of proton pump
- Omeprazole
MOA of omeprazol
- Inhibits Na+, K+-ATPase (proton pump)
necessary for transport of H+ from parietal cells of gastric mucous membrane lumen of stomach
Indications for omeprazol
- Peptic ulcer disease
- Gasatroesophagal reflux disease
- Chronic gastritis with the hypersecretion of acid
- Zolinger-Ellison syndrome
Side effects of omeprazol
- Naussea, diarrhea, constipation, meteorism, pain in the stomach
- Headache, weakness, depression, vision distrurbance
- Skin rash
- Arthralgia, myalgia, eosinophilia
contraindications of omeprazol
- pregnancy
- lactation
- childhood
- Severe hepatic disease
pharmacokinetics of rantidine
- administered orally, IM, IV
- well absorped via GI tract
- acts within 15 mins, works 8-12 hours
- excreted via urine in 24 hrs
pharmacokinetics of omeprazol
- 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
MOA of ranitidine
- Inhibits H2-histamine receptors in parietal cells of the gastric mucous membrane
pharmacodynamics of ranitidine
- Inhibition of gastric secretion
- Decrease in total volume of gastric juice
- Decrease in pepsin activity
indications of ranitidine
- 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.
side effects of ranitidine
- Headache, virtigo
- Skin rash
- Increase of plasma concentration of hepatic enzymes
- Thrombocytopenia
- Hypersensitivity
Contraindications for rantidine
- pregnancy
- lactation
- childhood
- Severe renal and hepatic diseases
- Gastric malignancy
Which M-cholinoblockers are used as antisecretory agents
- Pirenzepine
- Atropine
What are antacids?
- preparations for acid neutralization.
- Antacids are absorbable (NaHC03) and non-absorbable (CaC03, Mg(OH)2, Al(OH)3
Name 3 antacids
- Sodium bicarbonate
- Magnesium Oxide
- Aluminum hydroxide
Name 2 combined antacids
- Almagel
- Maalox
What are gastroprotectors and what do they do?
- Drugs that cover the stomach with a protective layer to prevent damage
- Ulcer healing
Name 2 gastroprotectors
- Sucralfate
- Bismuth subcitrate
Name an enhanced mucosal resistance drug
- Misoprostol