GI Drugs 1&2 Flashcards
What is omeprazole?
Proton Pump Inhibitor
Name 2 Proton Pump Inhibitors.
omeprazole
esomeprazole
What is Ranitidine?
Histamine H2 receptor antagonist
What is esomeprazole?
Proton Pump Inhibitor
what do Proton Pump Inhibitors do?
decrease gastric acid secretion,
potent irreversible binding
gynecomastia is a side effect of?
Ranitidine
Which antacid causes diarrhoea?
Magnesium hydroxide/carbonate/etc/
Which antacid(s) cause constipation?
Aluminum hydroxide
calcium carbonate
What can cause rebound acidity?
calcium carbonate
Sodium Bicarb is dangerous for kids because?
cause systemic alkalosis = kidney damage
What is sucralfate?
cytoprotective agent to ‘coat’ stomach again acid
Aluminum hydroxide side effect?
constipation
Name me a cytoprotective agent?
sucralfate
side effect of calcium carbonate?
constipation
Hyoscine butylbromide is a?
spasmolytic: muscarinic receptor antagonist
what is Hyoscine butylbromide used for?
block motility
Hyoscine butylbromide is tertiary or quaternary? absorbed?
quaternary
not absorbed
What is a direct spasmolytic?
mebeverine
peppermint oil
Misoprostol is a?
Protaglandin E analogue
What do Protaglandin E analogues do? 3 things
increase mucous
increase flow
decrease gastric secretions
Misoprotol and pregnant women =
DANGER, can cause uterine contractions leading to abortion
are antiemetic drugs for everyone?
nope, dangerous for kids/elderly cause of hydration
Name me a prostaglandin E analogue.
Misoprostol
Promethazine is a?
H1 receptor antagonist
big side effect of promethazine?
sedation
name a muscarinic receptor antagonist anti-emetic drug.
hyoscine hydrobromide
name an H1 receptor antagonist:
promethazine
What happens if you take Dopamine D2 receptor antagonists for too long?
risk of extrapyramidal side effects, parkinson’s like symptom
What is prochlorperazine?
Dopamine D2 receptor antagonists
What does Dopamine D2 receptor antagonists drugs do?
anti-emetic
Does Hyoscine hydrobromide absorbed? tertiary? quaternary?
tertiary
absorbed past blood brain barrier
what is Prochlorperazine?
Dopamine D2 receptor antagonists
When do you normally use Dopamine D2 receptor antagonists ?
for nausea associated with cancer treatments
What class of drugs were discovered within the Dopamine D2 receptor antagonists ?
anti-psychotics
chemoreceptor trigger zone for vomiting is inside or outside blood brain barrier? why?
outside so susceptible to more different kinds of stimuli
how to treat gastric stasis or gastroparesis?
metoclopramide cause it’s a pro-motility drug (5HT4 agonist)
What is ondansetron?
seretonin 5HT3 antagonist antiemetic
What does a 5HT4 agonist do?
increase upper gastric motility, no diarrhoea
What is Aprepinant?
Neurokinin 1 anti-emetic
dexamathasone used for what?
severe vomiting
Cannabanoids have have what kind of effects on vomiting?
anti-emetic
why does it take longer to poo again after laxative?
entire colon is empty, takes time to refill
what happens if you have too much fibre and slow transit?
impacted bowel
Name a Neurokinin-1 Receptor antagonist.
Aprepinant
definition of constipation?
less than 3 times a week with straining and hard stool
What can drugs cause constipation?
antipsychotics
alum/Ca antacids
Opiods
Name 2 bulking agents
Bran
Psyllium
How do bulking agents work?
absorb water>more bulk>stim bowel stretch receptors>poo
name a faecal softener/lubricant
docusate
Docusate with Senna is what?
faecal softener with a stimulant laxative
What was used as a faecal lubricant in the old days
liquid paraffin
Name a saline osmotic laxative?
Magnesium sulphate(Epsom salts)
What is a disaccharide hydrophilic colloid?
Lactulose: increases bulk via osmosis
Sorbitol is a?
polyols
Magnesium sulphate(Epsom salts) are?
saline osmotic laxative
What is bisacodyl?
potent stimulant laxative
Name 2 stimulant laxatives
bisacodyl
senna
name a polyol similar to lactulose
sorbitol
Lactulose is what kind of drug?
disaccharide hydrophilic colloid
what is coloxil? when do you use it?
docusate + senna
to counter effects of opioids
Name one opioid antidiarrhoeal drug
loperamide
What is simethicone?
defoaming polymer for flatulence treatment
What is loperamide?
opioid antidiarrhoeal drug