We gave 60 IBS patients 5 different treatments for 4 months. Here are the results, ranked.

"Nothing I try actually lasts."

That's the #1 frustration IBS patients reported in our recent survey of 300+ sufferers.

Second place?

"I've spent thousands on treatments that my doctor recommended - and I'm still planning my life around bathrooms."

So we ran a 4-month test with 60 IBS patients who had been struggling with unpredictable bloating, cramping, urgency, and flare-ups for an average of 7 years.

The goal: find the treatment that actually delivers lasting symptom relief.

We tested:

• Gut-directed hypnotherapy (app-based program)
• Low-dose amitriptyline (prescription)
• Low-FODMAP diet (with dietitian support)
• Antispasmodics (Buscopan, peppermint oil)
• Probiotics (clinical-grade, multi-strain)

These 60 patients were separated into 5 groups and followed each treatment for 4 months.

We tracked results using validated IBS Symptom Severity Scores (IBS-SSS) and self-reports on:

• Overall symptom relief
• Bloating and pain reduction
• Urgency and unpredictability
• Side effects

#1 - Gut-directed hypnotherapy

The only treatment that delivered lasting relief with zero side effects

What it is: A clinical program that retrains the communication loop between your gut and brain. Based on the Manchester Protocol developed over four decades of research. Now available through app-based programs.

How it worked: This was the clear standout. Patients reported something we rarely heard from other groups: not that symptoms were being managed, but that they had actually resolved. By month two, most had significantly less bloating and reduced urgency. By month four, the majority said IBS no longer dominated their daily life.

A systematic review found it had the largest effect size of any intervention studied for IBS.

Data from IBS-SSS scores and self-reports:

• Symptom improvement: 70% of patients
• Sustained at 4 months: Yes
• Side effects: None reported
• Would recommend: 82%
• Dropout rate: 11% (lowest)

Pros

• Largest effect size of any IBS treatment in systematic reviews
• Effects persist after the program ends - no ongoing cost
• Zero side effects
• Now accessible via app for under $1/day

Cons

• Requires daily commitment (15-20 minutes)
• The word "hypnotherapy" puts some people off before they try it

#2 - Low-dose amitriptyline

Helped with pain, but side effects were a real problem

What it is: A low-dose tricyclic antidepressant prescribed off-label for gut-brain nerve signaling. The ATLANTIS trial in The Lancet is the largest RCT studying this approach.

How it worked: Testers reported less cramping and fewer pain flare-ups within weeks. For pain-dominant IBS, it genuinely helped. But drowsiness, weight gain, and dry mouth were common. When two testers stopped mid-test, symptoms returned within two weeks.

Data from IBS-SSS scores and self-reports:

• Symptom improvement: 55% of patients
• Sustained at 4 months: Only while on medication
• Side effects: Common (drowsiness, weight gain, dry mouth)
• Would recommend: 41%
• Dropout rate: 38%

Pros

• Genuine benefit for pain-dominant IBS
• Targets gut-brain signaling, not just gut symptoms
• Well-studied in large clinical trials

Cons

• Effects disappear when you stop taking it
• Side effects are treatment-limiting for many
• Weight gain and drowsiness reported frequently

#3 - Low-FODMAP diet

Strong initial relief, but very difficult to sustain

What it is: An elimination diet developed by Monash University that restricts fermentable carbohydrates - onions, garlic, wheat, dairy, certain fruits.

How it worked: During the first 4-6 weeks, most testers saw reduced bloating and fewer flare-ups. But by month three, adherence collapsed. Testers described the diet as "socially isolating" and "a full-time job." A study in Neurogastroenterology & Motility found prolonged restriction can reduce beneficial gut bacteria.

Data from IBS-SSS scores and self-reports:

• Symptom improvement: 64% during elimination phase
• Sustained at 4 months: Dropped to 34%
• Side effects: Food anxiety, social isolation, nutritional risk
• Would recommend: 48%
• Dropout rate: 44%

Pros

• Effective for identifying personal food triggers
• Strong short-term symptom relief
• Well-researched and widely available

Cons

• Extremely difficult to sustain beyond a few months
• Socially isolating
• Does not address the underlying gut-brain sensitivity

#4 - Antispasmodics

Takes the edge off a flare. Doesn't fix anything.

What it is: Medications like Buscopan, mebeverine, and peppermint oil capsules that calm smooth muscle spasms in the gut.

How it worked: Some testers found them helpful for acute cramping. But relief was inconsistent and short-lived. By month two, most reported the effect had faded. The Cochrane review found only 1 in 5 patients gets meaningful benefit beyond placebo.

Data from IBS-SSS scores and self-reports:

• Symptom improvement: 20% beyond placebo
• Sustained at 4 months: No
• Side effects: Dry mouth, constipation, blurred vision
• Would recommend: 29%
• Dropout rate: 33%

Pros

• Can help with acute cramping flare-ups
• Widely available and inexpensive
• Peppermint oil has minimal side effects

Cons

• Modest effect at best
• Does nothing for bloating, urgency, or gut-brain dysfunction
• Effectiveness fades within months

#5 - Probiotics

The most popular option. The weakest results.

What it is: Clinical-grade, multi-strain probiotic supplements intended to improve gut microbiome composition.

How it worked: Despite being the treatment patients were most excited to try, probiotics delivered the weakest results. A few noticed mild improvement in bloating early on. By month two, most said they noticed no difference. The systematic review in Gastroenterology rates the evidence as "low to very low certainty."

Data from IBS-SSS scores and self-reports:

• Symptom improvement: Inconsistent
• Sustained at 4 months: No consistent evidence
• Side effects: Some reported increased bloating
• Would recommend: 22% (lowest)
• Dropout rate: 52% (highest)

Pros

• Generally safe
• A few specific strains show modest benefit for bloating
• Widely available without prescription

Cons

• Most products have zero IBS-specific clinical evidence
• Patients spend $300-$800 cycling through brands
• Some testers experienced worse bloating

Final word

Every treatment in this test provided some initial relief. But only one delivered results that actually lasted at 4 months - with zero side effects and no ongoing cost.

Gut-directed hypnotherapy reduced bloating, cramping, urgency, and flare-ups. 82% of testers said they would recommend it - the highest of any treatment we tested.

If you've tried diets, supplements, and medication and you're still struggling, the treatments you've been offered may not address what's actually driving your symptoms. IBS is a gut-brain condition. The treatment with the strongest evidence is the one that treats it that way.