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john
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09/12/2008
Publishing date:
03/01/1995
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High blood pressure—Some laxatives contain large amounts of sodium, which may make these conditions worse.
Kidney disease—Magnesium and potassium (contained in some laxatives) may build up in the body if kidney disease is present; a serious condition may develop.
Swallowing difficulty—Mineral oil should not be used since it may get into the lungs by accident and cause pneumonia; also, bulk-forming laxatives may get lodged in the esophagus of patients who have difficulty in swallowing.
Proper Use
For safe and effective use of your laxative:
Follow your doctor's instructions if this laxative was prescribed.
Follow the manufacturer's package directions if you are treating yourself.
With all kinds of laxatives, at least 6 to 8 glasses (8 ounces each) of liquids should be taken each day. This will help make the stool softer.
For patients taking laxatives containing a bulk-forming ingredient:
Do not try to swallow in the dry form. Mix with liquid following the directions on the product label.
To allow bulk-forming laxatives to work properly and to prevent intestinal blockage, it is necessary to drink plenty of fluids during their use. Each dose should be taken in or with a full glass (8 ounces) or more of cold water or fruit juice. This will provide enough liquid for the laxative to work properly. A second glass of water or juice by itself is often recommended with each dose for best effect and to avoid side effects.
When taking a product that contains only a bulk-forming ingredient, results often may be obtained in 12 hours. However, this may not occur for some individuals until after 2 or 3 days.
For patients taking laxatives containing a stool softener (emollient):
Liquid forms may be taken in milk or fruit juice to improve flavor.
When taking a product that contains only a stool softener, results usually occur 1 to 2 days after the first dose. However, this may not occur for some individuals until after 3 to 5 days.
For patients taking laxatives containing a hyperosmotic ingredient:
Each dose should be taken in or with a full glass (8 ounces) or more of cold water or fruit juice. This will provide enough liquid for the laxative to work properly. A second glass of water or juice by itself is often recommended with each dose for best effect and, in the case of saline laxatives, to prevent you from becoming dehydrated.
The unpleasant taste produced by some hyperosmotic laxatives may be improved by following each dose with citrus fruit juice or citrus-flavored carbonated beverage.
Lactulose may not produce laxative results for 24 to 48 hours.
Polyethylene glycol may not produce laxative results for 2 to 4 days.
Saline laxatives usually produce results within ½ to 3 hours following a dose. When a larger dose is taken on an empty stomach, the results are quicker. When a smaller dose is taken with food, the results are delayed. Therefore, large doses of saline laxatives are usually not taken late in the day on an empty stomach.
For patients taking laxatives containing mineral oil: