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Unformatted text preview: infestations
– used in conjunction with poison for worm • Chemical poisoning
– when chemical has gotten past stomach Cathartics: Contraindications
• Undiagnosed abdominal pain
– Appendicitis (may lead to rupture)
– inflammatory disease of G.I. tract (too irritating) • G.I. obstruction including fecal impaction
• Later stages of pregnancy Cathartics: Methods of Action
• Irritant (acts as stimulant to peristalsis)
– caster oil, phenolphthalein.
– These are not for nursing mothers. • Bulk-forming (colloids like agar and methylcellulose that attract water)
– • Some brand names: Metamucil®, Cologel®, Mitrolan®.
Lactulose (Chronulac®) acts both as an osmotic agent and as an irritant.
Natural sources: fruits and vegetables.
Special note: these same drugs may be used to treat diarrhea. Saline cathartics
– example: Milk of Magnesia and other magnesium salts
– hypertonic saline that attracts water to feces caution if renal impairment.
– Uses: Treat edema; Secure stool specimens for worms; Some poisonings. • Lubricants and fecal moistening agents - (both act to keep feces soft)
– hemorrhoid surgery, myocardial infarctions, aneurysms, cerebrovascular disorders Example: mineral oil, glycerine suppositories, sodium docusate
– Oils may inhibit absorption of fat soluble nutrients (...
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- Spring '14