Laxatives are products that help people empty their bowels and treat constipation. There are many types of laxatives, including stool softeners, bulk-forming laxatives, osmotics, lubricants, and stimulants. Stimulant laxatives are fast-acting and can stimulate the intestines to have a bowel movement within 15 to 60 minutes. However, they are not safe for regular use as they can cause the body to become dependent on them. Some examples of stimulant laxatives include Dulcolax, Senna, and Bisacodyl. Saline laxatives are another option for fast relief, as they pull water into the intestines and typically work within 30 minutes to 6 hours.
Characteristics | Values |
---|---|
How it works | Stimulant laxatives stimulate the intestines into having a bowel movement. |
Fast-acting types | Saline laxatives, stimulant laxatives, enemas, and suppositories. |
How to use | Follow the instructions on the package or as directed by a doctor. |
Side effects | Diarrhea, abdominal pain, decreased weight, weakness, rectal irritation/burning/itching, mild abdominal discomfort/cramps, nausea, and allergic reactions. |
Precautions | Not recommended for children under 6 unless directed by a doctor. Not to be used frequently or in high doses. |
What You'll Learn
- Stimulant laxatives: fast-acting, stimulate the intestines to have a bowel movement
- Osmotic laxatives: draw water into the intestines from surrounding tissues
- Bulk-forming laxatives: form a watery gel in the intestines, adding body and lubrication to stool
- Saline laxatives: magnesium-based laxatives that pull water into the intestines
- Lubricant laxatives: oily laxatives that coat the intestines to help move stool through quicker
Stimulant laxatives: fast-acting, stimulate the intestines to have a bowel movement
Laxatives are medicines that help people pass stool (have a bowel movement) if they are constipated. Stimulant laxatives are one of the five basic types of laxatives, alongside osmotic, bulk-forming, stool softeners, and lubricants.
Stimulant laxatives are fast-acting and work by stimulating the intestines to contract and push out the stool. The active ingredient in stimulant laxatives is usually either senna (also known as sennosides) or bisacodyl. They can be purchased over the counter in various forms, such as liquids, powders, chewables, tablets, and suppositories. Some common brand names of stimulant laxatives include Dulcolax, Ex-Lax, and Senokot.
Stimulant laxatives can be effective in treating constipation, but they should not be used for more than a week unless advised by a doctor. They can be habit-forming, and prolonged use can lead to laxative dependence and harm the bowels. It is important to follow the directions on the label and consult a doctor before use, especially if you are pregnant, breastfeeding, or have any health conditions.
While laxatives can provide relief from constipation, it is recommended to first try lifestyle changes such as increasing fiber intake, drinking more fluids, and exercising regularly. If these changes do not help, a gentle laxative may be considered, starting with bulk-forming laxatives as they are generally the gentlest and have the lowest risk of side effects.
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Osmotic laxatives: draw water into the intestines from surrounding tissues
Osmotic laxatives are a type of medication used to treat or prevent constipation. They work by drawing water from the rest of the body into the colon, thereby softening the stool and making it easier to pass. The term "osmotic" refers to the movement of fluid through a membrane so that the concentration is equal on both sides.
In people with constipation, the concentration of water in the wall of the colon and the inside of the colon (called the lumen) is balanced but too low to compensate for hard, dry stools. Osmotic laxatives alter this balance with substances such as salts, sugars, and other organic compounds that encourage the movement of water into the lumen. This helps to soften the stool and facilitate bowel movements.
Osmotic laxatives are available over the counter and by prescription. Examples of osmotic laxatives include polyethylene glycol (PEG), lactulose, sorbitol, magnesium citrate, and magnesium hydroxide (Milk of Magnesia). These laxatives typically take 2-3 days to work, and it is important to drink plenty of fluids when taking them to avoid dehydration.
Common side effects of osmotic laxatives include nausea, bloating, cramping, flatulence, and diarrhea. Overuse of these laxatives can lead to dehydration and the loss of electrolytes like sodium, calcium, and potassium. Therefore, it is important to follow the dosing instructions carefully and only use a laxative when needed.
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Bulk-forming laxatives: form a watery gel in the intestines, adding body and lubrication to stool
Laxatives are products that help people empty their bowels, and there are many types. Bulk-forming laxatives are often derived from plants and are different from other types of laxatives. They are most similar to stool softeners in that they help the bowels retain water. They are also different from stimulant laxatives, which stimulate nerves that speed up the movement of bowels through the intestines. Bulk-forming laxatives also do not lubricate the stools like lubricant laxatives do.
Bulk-forming laxatives absorb liquid in the intestines, creating a bulky, more liquid-like stool that's softer and easier to pass. They add an ingredient called soluble fibre to the stool, which draws water from the body into the stool, making it bigger and softer. The size increase stimulates the colon to contract and push the stool out.
Common bulk-forming laxatives include psyllium (Metamucil), polycarbophil (FiberCon), and methylcellulose (Citrucel). They are considered the gentlest type of laxative and are the least likely to cause side effects. They are often the first line of defence before stimulant or other types of laxatives are used. They are also generally safe for healthy people, although side effects or drug interactions may occur, including mild stomach pain, bloating, or gas.
To use bulk-forming laxatives, it is important to take them with at least 8 ounces of water or fruit juice to prevent bowel obstruction. It is also important to follow the dosage instructions on the label and to stay well-hydrated during the day. You should begin to feel relief within 12 hours to 3 days. However, they may take longer than other laxatives to work, and they should not be used when prompt or thorough bowel evacuation is necessary.
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Saline laxatives: magnesium-based laxatives that pull water into the intestines
Saline laxatives are a type of osmotic laxative. They are magnesium-based laxatives that pull water into the intestines, making it easier to have a bowel movement. They are useful for short-term constipation, but not suitable for everyone. For example, people on a magnesium-restricted diet or medication to lower sodium levels should avoid saline laxatives. They can also cause dehydration if used for extended periods.
Saline laxatives include magnesium citrate and magnesium hydroxide, which may produce a bowel movement in 30 minutes to 6 hours. They are available in different forms, such as soft chews, suppositories, and liquid. Dulcolax is a well-known brand that offers a range of saline laxative products, including soft chews, suppositories, liquid, and tablets.
Saline laxatives are generally considered safe and can be purchased over the counter. However, it is important to follow the instructions on the package or consult a healthcare professional for advice on proper usage and potential interactions or complications.
In summary, saline laxatives are a fast-acting option for occasional constipation relief. They work by pulling water into the intestines, making bowel movements easier. While they are easily accessible, it is important to use them appropriately and be aware of any potential side effects or interactions with other medications.
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Lubricant laxatives: oily laxatives that coat the intestines to help move stool through quicker
Lubricant laxatives are oily substances that coat the intestines to help move stool through the digestive system more quickly. They are also known as emollient laxatives. Lubricant laxatives include mineral oil, which can be purchased over the counter. This type of laxative makes the stool slippery, adding a slick layer to the intestinal walls and preventing water from being absorbed from the stool, thus keeping it soft.
Lubricant laxatives are highly effective, but they are best used as a short-term cure for constipation. Over a longer period, mineral oil can absorb fat-soluble vitamins from the intestine, and decrease the absorption of certain prescription drugs. It is important not to take mineral oil at the same time as other medications or supplements.
Lubricant laxatives are not suitable for regular use. Doctors may recommend them for difficult, short-term constipation. The oils in these laxatives may stick to fat-soluble vitamins and make them impossible to digest.
All laxatives are designed to treat constipation by softening hard stools or stimulating the bowels to get moving. They are available in many forms, including pills, capsules, liquids, suppositories, and enemas. Laxatives should be used sparingly and only when needed, as they can cause side effects such as bloating, gas, and stomach cramps.
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Frequently asked questions
Fast-acting laxatives are stimulant laxatives that can provide quick relief from constipation, usually within minutes to hours. They work by stimulating the intestines to have a bowel movement.
Some common fast-acting laxatives include Dulcolax, Senna, and Bisacodyl. These laxatives are available in different forms, such as tablets, suppositories, and liquid.
Fast-acting laxatives stimulate the nerves that control the muscles in the colon, forcing it into motion and moving the stool along. They may also increase the amount of fluid and salts in the intestines, making it easier to pass bowel movements.
Yes, it is important to use fast-acting laxatives as directed to avoid side effects. Overuse of laxatives can lead to laxative dependence, where the body becomes reliant on them to have a bowel movement. Rectal irritation, burning, itching, abdominal discomfort, and nausea are possible side effects. Consult a healthcare professional before using laxatives if you have any concerns or underlying health conditions.