ANSWER: c) Lactulose
Bisacodyl has structurally similarity to phenolphthalein; it
is a derivative of triphenylmethane. It is used to relieve constipation
especially in neurogenic bowel dysfunction, also preferred to be used before
colonoscopy. Neurologic bowel dysfunction is the condition which is characterized
by constipation or incontinence in the evacuation of the bowel due to spinal
cord injury affecting overall quality of life.
Senna is also used to relieve constipation, it is actually
used as non-prescription drug, and it is also used in irritable bowel syndrome
and in hemorrhoids.
Magnesium Sulfate is orally when used; it is used as saline
laxative.
Lactulose is a semi-synthetic disaccharide, used orally in
the treatment of constipation, it takes a long time to produce action that is
about eight to twelve hours, and effect is best prominent in two days.
Liquid paraffin is also used to relieve constipation, but it
is not occasionally used, as it causes irritation to the anus and also
interferes in the absorption of the fat-soluble vitamins.
Bisacodyl and Senna cannot be used for long term period as
it causes non-functioning atonic colon, magnesium salts on the other hand are
useful for rapid evacuation of the bowel, even magnesium salts and liquid
paraffin are not preferred for long term use, and in case of elderly and
bedridden the treatment is needed for a long period, so the best option is the
use of Lactulose which is a semi-synthetic disaccharide, which can be given for
a long time in management of constipation.
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