46.1 Irrespective of the type, all laxatives exert the following action:
A. Increase the content of solids in the faeces
B. Increase the water content of faeces
C. Reduce absorption of nutrients
D. Increase intestinal motility
46.2 Used as a laxative, liquid paraffin has the following drawbacks except:
A. It interferes with absorption of fat soluble vitamins
B. It is unpleasant to swallow
C. It causes griping
D. It can produce foreign body granulomas
46.3 A 70-year-old patient presented with weakness,
tiredness and muscle cramps. The ECG showed
Q-T prolongation, flattening of T wave and occasional
A-V block. His serum K+ was low (2.8 mEq/L). He
admitted taking a laxative every day for the past
several months. Which laxative could be responsible
for the above condition:
A. Bisacodyl
B. Liquid paraffin
C. Methylcellulose
D. Bran
46.4 A patient presented with abdominal pain and frequent
unsatisfactory bowel movement. For the last one
year he has been using a purgative twice weekly to
open his bowel. On colonoscopy the colon was found
to be atonic with bluish pigmentation of the mucosa.
Which is the most likely purgative that the patient has
been using:
A. Liquid paraffin
B. Ispaghula
C. Senna
D. Lactulose
46.5 Which of the following purgatives undergoes enterohepatic
circulation to produce prolonged action:
A. Docusates
B. Phenolphthalein
C. Castor oil
D. Mag. sulfate
46.6 The following purgative stimulates intestinal motility
independent of its action on mucosal fluid dynamics:
A. Castor oil
B. Senna
C. Docusates
D. Sod.pot. tartrate
46.7 Choose the correct statement about lactulose:
A. It stimulates myenteric neurones to enhance gut peristalsis
B. Administered orally it acts as a purgative within 2-4 hours
C. It is an osmotic laxative that produces soft but formed stools
D. All of the above are correct
46.8 The following laxative lowers blood ammonia level in hepatic encephalopathy:
A. Bisacodyl
B. Liquid paraffin
C. Lactulose
D. Magnesium sulfate
46.9 Select the purgative that should not be taken at bed time:
A. Magnesium sulfate
B. Bisacodyl
C. Senna
D. Ispaghula
46.10 Stimulant purgatives are contraindicated in the following:
A. Bed ridden patients
B. Before abdominal radiography
C. Spastic constipation
D. Atonic constipation
46.11 Saline osmotic purgatives are used for:
A. Treatment of constipation
B. Prevention of constipation in patients of piles
C. Avoidance of straining at stools in patients of hernia
D. Tapeworm infestation: following niclosamide administration
46.12 The most suitable laxative for a patient of irritable
bowel disease with spastic constipation is:
A. Dietary fibre
B. Liquid paraffin
C. Bisacodyl
D. Senna
46.13 The success of oral rehydration therapy of diarrhoea
depends upon the following process in the intestinal mucosa:
A. Sodium pump mediated Na+ absorption
B. Glucose coupled Na+ absorption
C. Bicarbonate coupled Na+ absorption
D. Passive Na+ diffusion secondary to nutrient absorption
46.14 For optimum rehydration, the molar concentration of glucose in ORS should be:
A. Equal to or somewhat higher than the molar concentration of Na+
B. Somewhat lower than molar concentration of Na+
C. One third the molar concentration of Na+
D. Three times the molar concentration of Na+
46.15 Cyclic nucleotides exert the following action on salt
transport across intestinal mucosal cells:
A. Both cyclic AMP and cyclic GMP enhance Cland HCO3 – secretion
B. Cyclic AMP enhances but cyclic GMP inhibits Cl– and HCO3 – secretion
C. Cyclic AMP inhibits but cyclic GMP enhances Na+ and Cl– reabsorption
D. Both cyclic AMP and cyclic GMP enhance Na+ and Cl– reabsorption
46.16 The concentration of sodium ions in the standard WHO oral rehydration solution is:
A. 40 m moles/L
B. 60 m moles/L
C. 90 m moles/L
D. 110 m moles/L
46.17 The 'new formula' WHO-ORS differs from the older
'standard formula' WHO-ORS in the following respect(s):
A. It has lower Na+ ion and glucose concentration
B. It has higher K+ ion concentration
C. It has no basic salt
D. Both 'B' and 'C' are correct
46.18 The following is true of 'new formula' WHO-ORS:
A. It has Na+ ion concentration of 75 mM/L
B. Its glucose concentration is 75 mM/L
C. Its total osmolarity is 245 mOsm/L
D. All of the above are correct
46.19 The electrolyte composition of standard WHO oral
rehydration solution is based upon that of:
A. Enterotoxigenic E. coli diarrhoea stools
B. Cholera stools in adults
C. Cholera stools in children
D. Rotavirus diarrhoea stools
46.20 Institution of oral rehydration therapy has the following
beneficial effect in diarrhoea:
A. Stops further diarrhoea
B. Restores hydration and electrolyte balance without affecting diarrhoea
C. Hastens clearance of the enteropathogen
D. Obviates the need for specific antimicrobial therapy
46.21 Apart from diarrhoea, oral rehydration solution has been employed in:
A. Severe vomiting
B. Burn cases
C. Heat stroke
D. Both ‘B’ and ‘C’
46.22 An adult patient of acute diarrhoea presents with
abdominal pain, fever, mucus and blood in stools and
is suspected to be suffering from Shigella enteritis.
What antimicrobial treatment would be most
appropriate:
A. No antimicrobial treatment
B. Metronidazole
C. Norfloxacin
D. Chloramphenicol
46.23 Antimicrobial treatment does not alter the course of the following diarrhoeas except:
A. Mild enterotoxigenic E.coli diarrhoea
B. Campylobacter diarrhoea
C. Coeliac disease diarrhoea
D. Food poisoning diarrhoea
46.24 The following diarrhoea is consistently benefited by
antimicrobial therapy:
A. Irritable bowel syndrome
B. Cholera
C. Salmonella diarrhoeas
D. Traveller’s diarrhoea
46.25 The therapeutic effect of sulfasalazine in ulcerative colitis is exerted by:
A. Inhibitory action of the unabsorbed drug on the abnormal colonic flora
B. Breakdown of the drug in colon to release 5-aminosalicylic acid which suppresses
inflammation locally
C. Release of sulfapyridine having antibacterial property
D. Systemic immunomodulatory action of the drug
46.26 The primary role of sulfasalazine in ulcerative colitis is:
A. Suppression of enteroinvasive pathogens
B. Control of acute exacerbations of the disease
C. Maintenance of remission
D. Both ‘B’ and ‘C’
46.27 The preferred drug for controlling an acute exacerbation
of ulcerative colitis is:
A. Prednisolone
B. Sulfasalazine
C. Mesalazine
D. Vancomycin
46.28 The following is/are true of mesalazine:
A. It exerts mainly local antiinflammatory action in the lower gut
B. It is a broad spectrum antidiarrhoeal drug
C. It can be administered as a retention enema
D. Both 'A' and 'C'
46.29 To be effective in ulcerative colitis, 5-aminosalicylic acid has to be given as:
A. Acrylic polymer coated tablet which releases the drug only in the lower bowel
B. A complex of two molecules joined together by azo bond
C. A retention enema
D. Any of the above ways
46.30 Mesalazine (coated 5-amino salicylic acid) differs from sulfasalazine in that:
A. It is more effective in ulcerative colitis
B. It produces less adverse effect
C. It has no therapeutic effect in rheumatoid arthritis
D. Both ‘B’ and ‘C’ are correct
46.31 A 3-year-old child was given one tablet three times a
day to control loose motions. The diarrhoea stopped
but next day the child was brought in a toxic condition
with abdominal distention and vomiting. He had
paralytic ileus, mild dehydration, low blood pressure
and sluggish reflexes. Which antidiarrhoeal drug
could have caused this condition:
A. Iodochlorhydroxyquinoline
B. Furazolidone
C. Loperamide
D. Metronidazole
46.32 A small amount of atropine is added to the diphenoxylate
tablet/syrup to:
A. Suppress associated vomiting of gastroenteritis
B. Augment the antimotility action of diphenoxylate
C. Block side effects of diphenoxylate
D. Discourage overdose and abuse of diphenoxylate
46.33 The opioid antidiarrhoeal drugs act by the following
mechanism(s):
A. They relax the intestinal smooth muscle
B. They inhibit intestinal peristalsis
C. They promote clearance of intestinal pathogens
D. All of the above
46.34 Choose the correct statement about the role of opioid
antimotility drugs in the management of diarrhoeas:
A. They are used to control diarrhoea irrespective of its etiology
B. They should be used only as a short-term measure after ensuring that enteroinvasive
organisms are not involved
C. They are used as adjuvants to antimicrobial therapy of diarrhoea
D. They are the drugs of choice in irritable bowel syndrome diarrhoea
46.35 The following is true of loperamide except:
A. It is absorbed from intestines and exerts centrally mediated antidiarrhoeal action
B. It acts on the opioid receptors in the gut
C. It increases tone and segmenting activity of the intestines
D. It inhibits intestinal secretion by binding to calmodulin in the mucosal cells
Ans:
46.1 B 46.2 C 46.3 A 46.4 C 46.5 B 46.6 B 46.7 C 46.8 C 46.9 A 46.10 C 46.11D 46.12 A 46.13 B 46.14 A 46.15 A 46.16 C 46.17 A 46.18D 46.19 C 46.20 B 46.21D46.22 C 46.23 B 46.24 B 46.25 B 46.26 C 46.27 A 46.28D 46.29D 46.30D 46.31 C 46.32D 46.33 B 46.34 B 46.35 A
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