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10 Best Laxatives For Severe Constipation 2025 in the United States

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#1

Winner

MiraLAX Gentle Constipation Relief Laxative Powder, Stool Softener with PEG 3350, Works Naturally with Water in Your Body, No Harsh Side Effects, Osmotic Laxative, 45 Dose

Rating
10.0
Chosen by1,208
Duration of Use

Most important from
39104 reviews

Duration of Use
It works wonders and is gentle, making it suitable for regular use.

MiraLAX Gentle Constipation Relief is an osmotic laxative powder designed for individuals facing severe constipation. One of its main strengths is how it works naturally with the water in your body to hydrate and soften stools, making bowel movements easier without the harsh side effects often associated with stimulant laxatives. Users can expect results within 1 to 3 days, which is a reasonable timeframe for relief.

Physician recommendations back MiraLAX, having been the #1 OTC laxative brand since its launch in 2007. This level of trust may give users confidence in its effectiveness. Additionally, the product is free from gluten, sugar, and preservatives, making it a suitable choice for those with dietary restrictions.

On the downside, while the gentle action of MiraLAX is a plus, it may not provide immediate relief for individuals who need quicker results, as other types of laxatives may work faster. The powder must be dissolved in a beverage, which could be inconvenient for some users who prefer more straightforward forms of laxatives.

Rating
10.0
Chosen by1,208
Duration of Use

Most important from
39104 reviews

Duration of Use
It works wonders and is gentle, making it suitable for regular use.
#2

MiraFAST Soft Chews, from the makers of MiraLAX, Gentle Constipation Relief in 30min-6hrs, Fast Acting Laxative, Stimulant Free Saline Laxative, Magnesium Hydroxide, Blueberry & Raspberry Flavor, 60ct

Rating
8.2
Type of Laxative
Onset of Action
Duration of Use

Most important from
2715 reviews

Type of Laxative
Provides gentle relief from severe constipation without causing cramping or diarrhea.
Onset of Action
Works faster than traditional powder laxatives, often taking effect within a couple of hours.
Duration of Use
Ideal for occasional use to supplement regular laxative routines, especially during travel or acute constipation.
Side Effects
Provides gentle relief from severe constipation without causing cramping or diarrhea.
Underlying Health Conditions
Contains sugar and some ingredients that might not suit all users looking for a cleaner formula.

MiraFAST Soft Chews are a saline laxative designed to relieve constipation relatively quickly, usually within 30 minutes to 6 hours. They contain magnesium hydroxide, which works by drawing water into the intestines to soften stools, making it easier to pass without causing the cramps some stimulant laxatives might bring. These soft chews come in kid-friendly blueberry and raspberry flavors and are suitable for ages 4 and up, which makes them convenient for family use. Because they are stimulant-free, they tend to be gentler on the digestive system.

The product is easy to carry around, fitting well into a busy lifestyle or travel plans. However, saline laxatives like MiraFAST are generally meant for short-term use and might not be suitable for people with certain health conditions like kidney problems or severe dehydration, so it's important to check with a doctor before use if you have underlying health concerns. While effective and fast-acting, frequent or long-term use isn't recommended as it can lead to electrolyte imbalances.

MiraFAST Soft Chews provide a reliable, quick, and gentle option for those needing fast relief from occasional severe constipation without the harsher side effects of stimulant laxatives.

Rating
8.2
Type of Laxative
Onset of Action
Duration of Use

Most important from
2715 reviews

Type of Laxative
Provides gentle relief from severe constipation without causing cramping or diarrhea.
Onset of Action
Works faster than traditional powder laxatives, often taking effect within a couple of hours.
Duration of Use
Ideal for occasional use to supplement regular laxative routines, especially during travel or acute constipation.
Side Effects
Provides gentle relief from severe constipation without causing cramping or diarrhea.
Underlying Health Conditions
Contains sugar and some ingredients that might not suit all users looking for a cleaner formula.
#3

MiraLAX Gentle Constipation Relief Laxative Powder with Stirrer, Stool Softener with PEG 3350, No Harsh Side Effects, Osmotic Laxative, 1 Doctor & OBGYN Recommended, 14 Dose

Rating
7.9
Type of Laxative
Onset of Action
Duration of Use

Most important from
9486 reviews

Type of Laxative
MiraLAX works like a charm for colonoscopy prep, clearing out the system effectively without discomfort.
Onset of Action
Staying close to a restroom after use is advisable due to its potent and prolonged effect.
Duration of Use
Following the directions closely is crucial for optimal results and minimal discomfort.
Side Effects
No harsh side effects like burning or the need for rash cream, even during intense use.

MiraLAX Gentle Constipation Relief Laxative Powder offers a gentle and effective option for those struggling with severe constipation. As an osmotic laxative, it works by drawing water into the colon, which helps to soften and hydrate stools over a period of 1-3 days. This slower onset can be beneficial for users who prefer not to experience the sudden urgency or cramping often associated with stimulant laxatives.

One of the standout features of MiraLAX is its mildness; it claims to have no harsh side effects like gas, bloating, or cramping, making it a safer choice for individuals with sensitive digestive systems. This product is gluten-free, sugar-free, and devoid of preservatives, appealing to those with dietary restrictions.

MiraLAX is also highly recommended by physicians, solidifying its reputation as a reliable option in over-the-counter constipation relief. The ease of use, simply mixing the powder into a beverage with no added taste or gritty texture, further enhances its appeal, especially for those who may be put off by traditional laxatives. While MiraLAX is an efficient solution for occasional constipation, it may not provide the immediate relief some users seek during severe constipation episodes. It’s also important to note that because it’s formulated to be gentle, it may take longer for results to be felt compared to more aggressive laxatives. Individuals with specific underlying health conditions should consult a healthcare professional before use to ensure safety.

Rating
7.9
Type of Laxative
Onset of Action
Duration of Use

Most important from
9486 reviews

Type of Laxative
MiraLAX works like a charm for colonoscopy prep, clearing out the system effectively without discomfort.
Onset of Action
Staying close to a restroom after use is advisable due to its potent and prolonged effect.
Duration of Use
Following the directions closely is crucial for optimal results and minimal discomfort.
Side Effects
No harsh side effects like burning or the need for rash cream, even during intense use.

Buying Guide for the Best Laxatives For Severe Constipation

Choosing the right laxative for severe constipation can be crucial for your health and comfort. It's important to understand the different types of laxatives available and how they work, as well as considering your specific needs and any underlying health conditions. Always consult with a healthcare professional before starting any new medication, including laxatives, to ensure it is safe and appropriate for your situation.
Type of LaxativeLaxatives come in various types, including bulk-forming, stimulant, osmotic, and stool softeners. Bulk-forming laxatives add fiber to your stool, making it easier to pass. Stimulant laxatives trigger the muscles of the intestines to contract, moving the stool along. Osmotic laxatives draw water into the intestines, softening the stool and making it easier to pass. Stool softeners add moisture to the stool to prevent straining. The type you choose should be based on your specific symptoms and how your body responds to different treatments. For severe constipation, stimulant or osmotic laxatives are often more effective.
Onset of ActionThe onset of action refers to how quickly the laxative takes effect. Some laxatives work within a few hours, while others may take a day or more. If you need immediate relief, a stimulant laxative might be the best choice as they typically work within 6 to 12 hours. Osmotic laxatives can take 1 to 3 days to work, making them a better option for ongoing management rather than immediate relief. Consider how quickly you need relief when choosing a laxative.
Duration of UseSome laxatives are intended for short-term use, while others can be used longer-term. Stimulant laxatives are generally recommended for short-term use due to the risk of dependency and potential for bowel damage with prolonged use. Bulk-forming and osmotic laxatives can often be used longer-term under medical supervision. If you have chronic constipation, a bulk-forming or osmotic laxative might be more appropriate for ongoing management.
Side EffectsDifferent laxatives come with different potential side effects. Stimulant laxatives can cause cramping and diarrhea, while osmotic laxatives might lead to bloating and gas. Bulk-forming laxatives can cause bloating and increased gas if not taken with enough water. Stool softeners generally have fewer side effects but may not be as effective for severe constipation. Consider your tolerance for potential side effects and discuss any concerns with your healthcare provider.
Underlying Health ConditionsCertain health conditions can influence which laxative is best for you. For example, if you have kidney disease, you should avoid certain osmotic laxatives that contain magnesium or phosphate. If you have a bowel obstruction or inflammatory bowel disease, some types of laxatives may be contraindicated. Always discuss your full medical history with your healthcare provider to ensure you choose a safe and effective laxative.

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