Special note these same drugs may be used to treat

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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 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 Cathartics: Methods • 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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