10 Best Laxatives For Constipation Fast Acting of 2025

Tested and Reviewed: Top 10 Laxatives For Constipation Fast Acting deals with expert ratings from 8.1 to a perfect 10

May 2025 Edition

Editor's Choice

9.7

Save 30%

Ex-Lax

Ex-Lax Maximum Strength Stimulant Laxative Constipation Relief Pills for Occasional Constipation, Gentle Laxatives - 24 Count

30% OffFree Shipping

Editor's bottom line:

“This laxatives for constipation fast acting is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

One 24 count box of ex-lax Maximum Strength Stimulant Laxative Pills for Relief of Occasional Constipation, Gentle Laxatives
Gentle laxative tablets formulated for dependable overnight constipation treatment
Maximum strength sennosides 25mg laxative tablets
Constipation relief tablet is easy to dose with no mixing and no mess
Overnight laxative that typically produces results in as little as 6 to 12 hours

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Picked by 256 people today

9.5

Amazon Basic Care

Amazon Basic Care ClearLax Polyethylene Glycol 3350 Powder for Solution, Osmotic Laxative, Relieves Occasional Constipation, Unflavored, 1.68 pound (Pack of 1)

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Main Highlights

ACTIVE INGREDIENT: The active ingredient of this osmotic laxative is Polyethylene Glycol 3350; compare to MiraLAX active ingredient
CONSTIPATION RELIEF: Relieves occasional constipation/irregularity; generally produces a bowel movement in 1 to 3 days
DOCTOR RECOMMENDED ACTIVE INGREDIENT: Polyethylene Glycol 3350 is the Number One Doctor Recommended Laxative Active Ingredient (of U.S. physicians surveyed by an independent market research firm, excluding Therapeutic Fiber and Stool Softeners)
SOFTENS THE STOOL: This laxative increases frequency of bowel movements and softens the stool
UNFLAVORED POWDER: Unflavored laxative powder dissolves in any beverage; grit free, sugar free and gluten free; for adults and children 17 years of age and older

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9.5

Save 11%

Dulcolax

Dulcolax Stimulant Laxative Tablets, Predictable & Effective Constipation Relief, Relieves Straining & Bloating, Bisacodyl 5 mg, 10 Count

11% OffFree Shipping

Main Highlights

Includes: One (1) 10-count box of Dulcolax stimulant laxative comfort-coated tablets
Dependable constipation relief: Dulcolax tablets reactivate your natural gut rhythm* for effective morning constipation relief
Works fast: Dulcolax provides constipation relief in as little as six to 12 hours, starting with just one tablet
Effective active ingredient: Dulcolax stimulant laxative tablets are made with bisacodyl, which helps increase movement in the intestines
On-the-go relief: Pack these overnight laxative pills in your travel essentials to help you get back to being regular when stress and overindulgence slow you down
Doctor recommended: Dulcolax is the No. 1 doctor-recommended brand among OTC stimulant laxative brands
Predictable relief: Provides predictable relief of hard, dry stools caused by occasional constipation and irregularity

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9.2

TIME-CAP LABS, INC.

TIME-CAP LABS, INC. Timely Bisacodyl 5mg - 100 Tablets - Laxatives for Constipation Relief - Compared to The Active Ingredients in Dulcolax - Gentle, Dependable Constipation Relief for Adults

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Main Highlights

Feel Like Your Old Self Again ... Constipation got you down? Timely 5mg bisacodyl laxative tablets have got your back. Bisacodyl is a stimulant laxative that triggers bowel movements for predictable relief in 6 - 12 hours.
Shop Smart and Save Big ... Don't spend a small fortune on just the label. Timely bisacodyl tablets give you National Brand equivalency at a fraction of the price. Get an effective bisacodyl laxative priced right.
Live Life Without Reservations ... These laxatives for constipation promote gastrointestinal motility, helping take care of constipation & irregularity.
Convenience You'll Relish ... We've formulated Timely bisacodyl tablets 5mg to seamlessly blend into your lifestyle. Take the recommended dosage before bed and wake up in the morning feeling the difference.
Were Obsessed with Quality Its what guides us through every stage of production. 3rd party tested and made to exacting standards, Timely products never cut corners when it comes to your wellbeing.

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9.0

Save 25%

Dulcolax

Dulcolax Saline Laxative Liquid, Fast & Gentle Constipation Relief, Natural Laxatives, Softens Stool, Cherry Flavor, Magnesium Hydroxide 1200 mg, 12 fl. oz.

25% OffFree Shipping

Main Highlights

Includes: One (1) 12-fluid-ounce bottle of Dulcolax cherry flavor saline laxative liquid
Works fast: This liquid laxative offers gentle relief from constipation in as little as 30 minutes to six hours
Stimulant free: The cherry-flavored liquid laxative works naturally with the water in your body
Convenient: Pack this liquid laxative in your travel essentials for reliable relief during stress or overindulgence
Trusted relief: Dulcolax has been providing safe constipation relief for over 70 years
Natural harmony: This cramp-free formula works with your body to hydrate stools and reduce discomfort

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8.8

Fleet

Fleet Laxative Glycerin Suppositories for Adult Constipation, Adult Laxative Jar Aloe vera, 50 Count

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Main Highlights

Fleet Laxative Glycerin Suppositories provide fast, effective relief from occasional constipation and irregularity in 15 minutes to 1 hour
Laxative glycerin suppository works with your body to help gently unblock your system by attracting water into the colon
Fleet suppositories' easy to use, lubricated gentle glide tips are uniquely cone-shaped and formulated with soothing aloe for easier insertion
Fleet Laxative Glycerin Suppositories are stimulant-free laxatives for constipation relief
Fleet is the number one doctor-recommended brand of enemas* and suppositories** *ProVoice Data 2/1/22 to 1/31/23; **IQVIA Survey, 5/1/23 to 4/30/24 and TABS, L52W thru 5/19/24
Contains 1 jar of Fleet Laxatives, Laxative Glycerin Suppositories for Adult Constipation, 50 suppositories

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8.6

Save 15%

Dulcolax

Dulcolax Saline Laxative Soft Chews, Fast-Acting Laxative, Gentle Constipation Relief, Mixed Berry Flavor, Magnesium Hydroxide 1200 mg, 30 Count, Occasional Constipation.

15% OffFree Shipping

Main Highlights

Includes: One (1) 30-count bag of Dulcolax saline laxative mixed berry soft chews
Works fast: Dulcolax soft chews provide fast relief from constipation in as little as 30 minutes to six hours
Stimulant free: Dulcolax Soft Chews cramp-free formula works naturally with the water in your body for gentle constipation relief
Effective active ingredient: Dulcolax saline laxative soft chews are made with magnesium hydroxide, which hydrates stools and makes them easier to pass
Puts you in control: Pack these laxative chews in your travel essentials to help you get back to being regular when stress and overindulgence slow you down
Trusted Relief: Get relief you can trust from Dulcolax, providing trusted and safe relief for over 70 years and counting
Convenient soft chew: These mixed-berry soft chews taste great and are individually wrapped for on-the-go relief

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8.3

Save 25%

Dulcolax

Dulcolax Stimulant Laxative Tablets, Predictable & Effective Constipation Relief, Relieves Straining & Bloating, Bisacodyl 5 mg, 100 Count

25% OffFree Shipping

Main Highlights

INCLUDES: One (1) 100-count box of Dulcolax stimulant laxative comfort-coated tablets
DEPENDABLE CONSTIPATION RELIEF: Dulcolax tablets reactivate your natural gut rhythm* for effective morning constipation relief
WORKS FAST: Dulcolax provides constipation relief in as little as six to 12 hours, starting with just one tablet
EFFECTIVE ACTIVE INGREDIENT Dulcolax stimulant laxative tablets are made with bisacodyl, which helps increase movement in the intestines
ON-THE-GO RELIEF: Pack these overnight laxative pills in your travel essentials to help you get back to being regular when stress and overindulgence slow you down
DOCTOR RECOMMENDED: Dulcolax is the No. 1 doctor-recommended brand among OTC stimulant laxative brands
PREDICTABLE RELIEF: Provides predictable relief of hard, dry stools caused by occasional constipation and irregularity

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8.1

MiraLAX

MiraFAST Soft Chews, from The Makers of MiraLAX, Gentle Constipation Relief in 30min-6hrs, Fast Acting Laxative, Stimulant Free Saline Laxative, Magnesium Hydroxide, Mixed Berry Flavor, 60ct

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Main Highlights

From the Makers of MiraLAX: MiraFAST Soft Chews is a saline laxative that provides fast constipation relief that you can trust to be gentle.
Quick and Gentle: Fast-acting relief from constipation in 30 minutes to 6 hours, giving you the freedom to tackle your busy day without harsh side effects.
No Cramps, No Stimulants: Formulated with magnesium hydroxide, MiraFAST Soft Chews works naturally with the water in your body to hydrate and soften stools, providing effective constipation relief without uncomfortable cramps.
Bite-Size Relief: Enjoy fast, gentle constipation relief in tasty soft chews.
Tasty and Convenient: This pack includes 60 individually wrapped tasty soft chews in blueberry and raspberry flavor. Easy to carry around so you can use it at home or keep it handy for travel.
Constipation Relief for Ages 4+: Tasty and easy to bite, MiraFAST Soft Chews is a reliable constipation solution for your whole family ages 4+.
Anytime, Anywhere: MiraFAST Soft Chews provides fast and gentle constipation relief for women, men, and kids ages 4+.

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8.1

MiraLAX

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

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Main Highlights

UNBLOCK YOUR SYSTEM: MiraLAX, an osmotic laxative, works naturally with the water in your body to hydrate, soften, and ease stool through your colon in 1-3 days. Other stimulant laxatives stimulate the nerves to move stool through the colon immediately
NO HARSH SIDE EFFECTS: MiraLAX helps relieve your occasional constipation without causing gas, bloating, cramping, or sudden urgency
#1 PHYSICIAN RECOMMENDED: Since going on the market as an OTC laxative in 2007, MiraLAX has been the #1 Physician Recommended OTC brand of laxative
HOW TO USE: Fill bottle cap to the indicated line (white section in cap) and pour into 4 to 8 ounces of hot or cold beverage. Mix until the powder is fully dissolved and drink. MiraLAX has no added taste or grit
FREE FROM: Gluten, sugar, and preservatives

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Our Best Overall Choice

Best Choice

9.7

Ex-Lax

Ex-Lax Maximum Strength Stimulant Laxative Constipation Relief Pills for Occasional Constipation, Gentle Laxatives - 24 Count

30% OffFree Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

One 24 count box of ex-lax Maximum Strength Stimulant Laxative Pills for Relief of Occasional Constipation, Gentle Laxatives
Gentle laxative tablets formulated for dependable overnight constipation treatment
Maximum strength sennosides 25mg laxative tablets
Constipation relief tablet is easy to dose with no mixing and no mess
Overnight laxative that typically produces results in as little as 6 to 12 hours

Show Price

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