Laxatives are used to treat constipation and are available over the counter without a prescription. There are five basic types of laxatives: stimulant, osmotic, bulk-forming, stool softeners, and lubricants. Stimulant laxatives trigger the intestines to contract and push out the stool. They can be effective in treating constipation, but they can also be habit-forming and harmful to the bowels if used for an extended period. This is why stimulant-free laxatives are often sought after.
Characteristics | Values |
---|---|
Definition | A laxative that does not contain stimulants |
Types | Bulk-forming, osmotic, stool softener |
How they work | By increasing the bulk of your stool, softening your stool, or increasing the fluid content of your stool |
Use | To treat constipation |
Administration | Taken by mouth with a full glass of water, or as a suppository |
Onset of action | 6-12 hours |
Duration of use | Not to be used for more than 7 days unless directed by a doctor |
Side effects | Stomach/abdominal pain or cramping, nausea, diarrhea, weakness, allergic reaction |
What You'll Learn
Stimulant laxatives can be used to treat constipation
Constipation is a common and uncomfortable condition that affects people of all ages. Laxatives are a type of medicine that can be used to treat constipation. Stimulant laxatives are a specific type of laxative that can be used to ease constipation by inducing a bowel movement. They are available over-the-counter (OTC) and come in various forms, including tablets, liquids, and suppositories. The active ingredients in stimulant laxatives differ, but they all work by speeding up colonic muscle movement (motility) and keeping water in the intestines, which helps to cause movement.
Stimulant laxatives are generally safe for short-term use and appear to be well-tolerated by both adults and children. However, it is important to carefully follow the directions on the package or from a healthcare provider. Common side effects of stimulant laxatives include abdominal pain, cramps, and temporary symptoms of fecal incontinence. More serious side effects, such as allergic reactions, electrolyte imbalances, and liver damage, have also been reported. Therefore, it is important to check with a healthcare provider before using stimulant laxatives, especially if there are concerns about potential interactions with other medications or existing health conditions.
When treating constipation, it is recommended to start with lifestyle changes such as increasing fibre intake, drinking plenty of fluids, and exercising regularly. If these measures do not help, a bulk-forming laxative is typically the first choice as it is considered gentle and safe. If bulk-forming laxatives are ineffective, osmotic laxatives or stimulant laxatives can be considered. It is important to note that laxatives should only be used occasionally and for up to a week at a time, and they should not be used daily to ease constipation as this can be harmful.
In summary, stimulant laxatives can be effective in treating constipation by inducing bowel movements. However, they should be used with caution and only as directed to avoid potential side effects. It is also important to prioritize lifestyle changes and consider other types of laxatives before resorting to stimulant laxatives for the management of constipation.
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Osmotic laxatives soften stool for easier passing
Osmotic laxatives are medications used to treat or prevent constipation. They work by drawing water into the stool, making it softer and easier to pass. Constipation occurs when stools are hard and difficult to pass. Osmotic laxatives increase the amount of fluid in the intestines, softening the stools and making them easier to pass.
The term "osmotic" refers to the movement of fluid through a membrane to equalise the concentration on both sides. Osmotic laxatives work in a similar way, altering the balance of water in the colon by using substances such as salts, sugars, and other organic compounds. This encourages the movement of water into the lumen, softening the stool.
Osmotic laxatives are different from other types of laxatives, such as emollient, lubricant, and stimulant laxatives, as they can be used to prevent or treat chronic constipation, rather than just occasional constipation. They are available over the counter and by prescription. Examples of osmotic laxatives include Milk of Magnesia, lactulose, and polyethylene glycol (PEG).
It is important to follow the dosing instructions carefully when using osmotic laxatives and only use them when needed. They can cause side effects such as nausea, bloating, cramping, flatulence, and diarrhoea. Overuse of osmotic laxatives can lead to dehydration and other complications, as they can interfere with the body's chemistry.
If you are experiencing chronic constipation, it is recommended to see a healthcare provider to identify the underlying cause, as it can often be improved with diet, exercise, and increased fluid intake.
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Bulk-forming laxatives increase stool bulk
Bulk-forming laxatives are a type of laxative that treats constipation by increasing the bulk or size of stools. They are often recommended as a first-choice treatment option due to their gentle and gradual effectiveness in relieving constipation. Here are some key points about bulk-forming laxatives and how they increase stool bulk:
- Mechanism of Action: Bulk-forming laxatives contain soluble fiber, which absorbs liquid in the intestines. This absorption of liquid leads to an increase in the amount of water in the stool, making it bulkier, softer, and easier to pass. This mechanism is different from stimulant laxatives, which speed up bowel movement, and lubricant laxatives, which lubricate the stools.
- Examples: Common bulk-forming laxatives include psyllium (Metamucil), polycarbophil (FiberCon), and methylcellulose (Citrucel). These are often marketed as laxatives or fiber supplements.
- Effectiveness: Bulk-forming laxatives are effective in treating chronic constipation caused by factors such as diet, lifestyle, recent surgery, or medication. They provide a gradual improvement in constipation symptoms, reducing the risk of side effects like cramping or explosive diarrhea associated with stimulant laxatives.
- Safety: Bulk-forming laxatives are generally safe for healthy individuals. However, side effects may include mild stomach pain, bloating, gas, and, in rare cases, an allergic reaction. It is important to take these laxatives with adequate water or fruit juice to prevent bowel obstruction and stay well-hydrated throughout the day.
- Dosage and Timing: It is recommended to follow the dosage instructions on the label. Relief from constipation can be expected within 12 hours to 3 days of taking bulk-forming laxatives. It is important not to take any medication within two hours of taking a laxative, as they can interfere with how the body absorbs medications.
- Precautions: Bulk-forming laxatives should be avoided if you have symptoms of appendicitis, miss bowel movements for more than two days with abdominal pain, experience a sudden change in bowel habits lasting two weeks or more, or have taken medication within the last two hours. Consult your doctor before using bulk-forming laxatives if you have difficulty swallowing or conditions like kidney disease or diabetes, as these can increase the risk of electrolyte imbalances.
- Lifestyle Changes: While bulk-forming laxatives can provide relief, it is important to address the underlying causes of constipation. This includes making lifestyle changes such as adopting a high-fiber diet with whole grains, fruits, and leafy vegetables, staying hydrated, and increasing physical activity.
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Stool softeners increase the fluid content of stool
Stool softeners are a type of laxative called an emollient laxative. They work by increasing the amount of water and fat that mixes with the stool, making it softer and easier to pass. The active ingredients in stool softeners are docusate sodium and docusate calcium. Stool softeners are available in the form of tablets, capsules, syrup, liquid, and rectal enema. They are usually taken at bedtime and can take between 12 to 72 hours to start working.
Stool softeners are often the first method used to prevent and treat occasional constipation. They are especially useful when straining to have a bowel movement should be avoided, such as after a heart attack or surgery. They are generally well-tolerated and considered safe to use, with mild side effects such as stomach pain, nausea, and diarrhea.
It is important to note that stool softeners should not be taken for more than one week unless directed by a healthcare provider. They are intended for short-term use and should be taken exactly as directed.
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Lubricant laxatives coat the surface of the stool
Lubricant laxatives, also known as emollient laxatives, are used for the acute or subacute management of constipation. They work by coating the colon and stool with a layer of mineral oil, making it slippery and thus facilitating the passage of stool. This coating has a dual action: it prevents the colon from absorbing water from the stool, so it stays soft, and it makes for a slippery passage that eases defecation. Lubricant laxatives are best used for immediate relief from short-term constipation.
Mineral oil is the active ingredient in lubricant laxatives. It is highly effective in treating constipation, but it should not be used regularly. This is because, over time, it can interfere with the absorption of fat-soluble vitamins such as vitamins A, D, E, and K. It can also decrease the absorption of certain prescription drugs. Therefore, it is important not to take mineral oil at the same time as other medications or supplements.
Lubricant laxatives are available in the form of oral capsules or tablets. They can also be administered as suppositories, which are tiny dissolvable capsules that are inserted directly into the anus.
Lubricant laxatives are not suitable for everyone. They should be avoided by people taking medication to lower their sodium levels or those taking other mineral-based drugs, such as medications to reduce calcium in the kidneys.
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Frequently asked questions
A laxative is a type of medicine that treats constipation by softening hard stools or stimulating the bowels to get moving.
There are five basic types of laxatives:
- Stimulant laxatives
- Osmotic laxatives
- Bulk-forming laxatives
- Stool softeners
- Lubricants
A stimulant-free laxative is a type of laxative that does not contain stimulant ingredients such as senna or bisacodyl. Stimulant-free laxatives include bulk-forming laxatives, osmotic laxatives, and stool softeners.