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I don't know of any adult diaper that won't leak when there's diarrhea in them, so instead I would try to figure out what is causing the diarrhea and find ways to stop it. Perhaps a visit to the doctor is what's needed here to get answers as to what exactly is going on to cause the diarrhea.
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Reply to funkygrandma59
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From Google AI:

The best adult diapers for diarrhea require maximum containment, featuring high, sturdy leak guards and a plastic-backed shell to handle sudden, liquid-heavy voids and odor control. Top-rated options for this purpose include NorthShore MegaMax, Seni Quattros, and BetterDry/Crinklz for their superior containment and capacity. 
Parentgiving
 
Top Rated Products for Diarrhea
Best Overall (Maximum Protection): NorthShore MegaMax Tab-Style Briefs. Their plastic backsheet resists sagging, while tall leak guards keep liquid stool contained.

Best for Daytime/Active: GoSupreme Lite Pull-Ups or Wellness Absorbent Underwear, which feature strong elastics and high capacity.

Best Overnight: Dry Direct Maxi Overnight Briefs or Tranquility Premium ATN (All-Through-the-Night) Briefs.

Best for Comfort/Softness: Bambino Bianco or Tykables brands, which offer high-quality, comfortable materials that securely hold solid and liquid waste. 

Key Features to Look For
Tall Leak Guards: Essential to prevent liquid stool from leaking out the sides.

Plastic Backing (PE): Best for odor containment and preventing sagging compared to cloth-like materials.
Tape-on Briefs: Usually offer a more secure, adjustable fit for heavy fecal incontinence than pull-ups. 

Tips for Management
Frequent Changes: Change immediately after a bowel movement to protect skin.

Use Boosters: Use Tranquility TopLiner Booster Pads (or similar) to add extra absorbency at the rear.

Clean Up: Use heavy-duty, large wipes like NorthShore Supreme Quilted Wipes for easier clean
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Reply to lealonnie1
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I'd like to first point out that the OP (or their loved one) may have a diagnosis and be working with a doctor. I don't know why so many people assume she/LO doesn't know what's causing the problem. We're not here to be amateur doctors.

Susan asked for a recommendation for a product that will help contain nighttime diarrhea. She did not go into details on whether it was explosive or watery or anything. So let's try to help her out with this particular question. What's a good product to keep the yuck contained? I did see someone advised on other ways to do that, which looked helpful.

I'd like to first point out that the OP/LO may have a diagnosis and be working with a doctor. I don't know why so many people assume they don't know what's causing the problem.

As a person with chronic illnesses that can cause this, I haven't yet found a good answer for a product, and I would be interested to know, too.

Susan, you have my empathy. This is a no-fun issue to have to deal with, and I'm sorry it's something you or your loved one has to deal with.
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Reply to StacyAa
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SusanBigley Apr 26, 2026
Thank you, I truly appreciate your post. Some of the replies that I receive(SMH)!! My mother was diagnosed with severe Alzheimer’s. She recently has had a horrible bout of diarrhea and fever. Of course I’ve taken her to the doctor. Thank you for answering my question. God bless.
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I have a chronic partial small bowel obstruction and often have overflow diarrhea at night. The best product I’ve found is GoodNites. They’re meant for young girls (and boys), but the XXL size fits up to 165 lbs. They fit more snugly than adult diapers, which helps contain any leaks more effectively. They’re also more comfortable. Sorry you and your mom are dealing with this!
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Reply to GB2112
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My mom had this problem on and off for YEARS. It was worse over the past two years and really affecting her quality of life. Her PCP started her on a once daily Imodium and as well as very high fiber gummies and it finally put the explosive and very messy accidents to bed.
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Reply to ShirleyDot
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My mother in law has bowel incontinence, we use the Walmart brand Assurance, and it's specifically for incontinence, though it prevents her soiling her clothes and my furniture, she still has to clean herself up. But they seem to do the trick.
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Reply to Freyasmom24
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I give my mother (98) Metamucil every am to help keep her bowls consistent.
When I have to work and she forgets ( dementia) I hear from her.
I'm not sure if this helps but good luck. 💚
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Reply to Tflowers
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I do not know what product can be used to contain it more effectively. However, if you have worked with your GI doc or PCP and have a diagnosis that allows it, immodium is great. My dad cannot always take that, but he is allowed a prescribed med called Cholestyramine  oral suspension 4mg packets. It is a stool thickener and returns his watery stools (that are less controllable day and night), to a more solid and controllable situation. Hope this helps!
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Reply to Hope21
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CVS STORE BRAND Underwear for women are very absorbent. Try any brand of depends type underwear for women.
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Reply to Abcarb
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I am not sure about you undergarment question, but consider having everyone write down what you family member is eating and drinking throughout the day to identify possible diarrhea triggers.
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Reply to WordsofWisdom
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