Case study · Gut health
Bloating that was likely caused by a painkiller
A woman in her late 30s had years of severe bloating even though she already ate a clean, gluten-free, dairy-free diet. The likely cause was not her food but a painkiller she took every day for back pain. With her prescribing clinicians tapering it and her pain still managed, her digestive symptoms resolved within about three months.
De-identified case study · Published
At a glance
8
sessions over four months
Week 5
bloating and pain nearly gone
Week 13
digestive symptoms resolved
Week 17
occasional gluten and dairy tolerated
- Profile
- Woman in her late 30s, 5 ft 7 in, 170 lb, a working parent, perimenopausal
- Main problem
- Severe bloating and abdominal discomfort for several years
- The puzzle
- It persisted despite a clean, gluten-free, dairy-free diet and normal bowel habits
- Working explanation
- Likely long-term use of meloxicam, an anti-inflammatory painkiller, irritating her stomach and gut lining
- Key step
- A gradual taper off the painkiller by her prescribing clinicians, with her pain still managed
- Week 5
- Off meloxicam under her clinicians’ care; bloating and pain nearly resolved
- Week 13
- Digestive symptoms completely resolved
- Week 17
- Stable, and eating occasional small amounts of gluten and dairy without trouble
When a clean diet is not the answer
She was already doing everything people with bloating are usually told to do. If a clean diet has not fixed it, the cause is probably not in the diet.
Gluten-free, dairy-free, home-cooked whole foods, plenty of vegetables and lean protein, and normal, regular bowel movements. By the usual approach there was nothing left to remove.
The likely cause turned out to be in her medicine cabinet. She had back pain from osteoarthritis and had taken meloxicam, a nonsteroidal anti-inflammatory drug (NSAID), for a long time. NSAIDs are well known to irritate the lining of the stomach and gut. What followed was taking something away, not adding something new.
Where she started
Persistent bloating, fullness, gas and a feeling that food was not fully digested, despite eating well, and despite normal, regular bowel movements.
She also had food sensitivities and noticed a distinct odor on her breath when she exercised. After a COVID infection she had daily diarrhea for a time, and her digestion had felt sensitive ever since.
Her medicines included meloxicam and prednisone for osteoarthritis and back pain. She was perimenopausal and on hormone therapy, which had already improved her sleep and mood a great deal.
A typical day: Greek yogurt and fruit for breakfast; chicken, tofu, soups and vegetables at lunch and dinner; quinoa, almonds and blueberries. By any ordinary standard, a clean diet.
She was already seeing family medicine, a women’s health nurse practitioner and a psychologist, and later a gastroenterologist, so the nutrition work had to fit into a team.
The working explanation
At her first visit, her dietitian named long-term meloxicam use as the likely driver of stomach irritation, gut-lining irritation and an imbalance of gut bacteria.
Possible contributors were also listed: lingering gut inflammation after COVID, sluggish bile flow, and mild malabsorption from changes in her gut bacteria. These were possibilities to keep in view, not findings.
The painkiller was never confirmed as the cause by endoscopy or biopsy. It was a clinical judgment, supported later by how her symptoms changed as the medicine was tapered.
What changed
The central step was raising the painkiller with the clinicians who prescribed it, so they could taper it while keeping her pain managed. Gentle gut support and structure came alongside.
The painkiller, handled by her prescribers
Her prescribing clinicians tapered the meloxicam gradually, and black seed oil was used for anti-inflammatory support in its place. Her clinicians did not simply stop a painkiller prescribed for back pain: her pain had to stay managed for the taper to hold.
Support while the gut settled
A digestive enzyme with meals, berberine for the bacterial imbalance, and L-glutamine for the gut lining. A probiotic was deliberately held back until the bloating improved, rather than added to an irritated gut.
Structure without more restriction
She stayed gluten-free and dairy-free, with nothing further cut from an already narrow diet. A 16-hour overnight eating break and photo-based meal tracking with notes on how she felt after each meal added structure.
Testing, done properly
Comprehensive stool testing was suggested to look at gut bacteria, gut-lining permeability and inflammation. When her gastroenterologist arranged further testing, her supplement plan was paused so it would not cloud the results, trading a little short-term comfort for a clearer answer.
Her plan, not a recommendation
The black seed oil, enzymes, berberine, L-glutamine and later magnesium glycinate and L-theanine were chosen for her, with her care team. They are not recommendations for anyone else.
Don’t stop or change a prescribed medicine on your own. If you think one is affecting your gut, raise it with the clinician who prescribed it.
How it went
By week 5 her bloating and pain were nearly gone, by week 13 her digestive symptoms had resolved, and by week 17 she could eat small amounts of gluten and dairy again.
Week 5
Her prescribing clinicians had taken her off meloxicam completely, two weeks earlier. Bloating and abdominal pain were minimal to nearly resolved. She found the black seed oil very effective for her pain and inflammation, which is why the taper held. Some high-FODMAP foods, such as leeks, still caused mild discomfort.
Week 13
Her digestive symptoms had completely resolved, and she remained off meloxicam under her clinicians’ care. With her gut settled, the focus moved to her other goals: about 6 pounds lost over six weeks, which she felt she could keep up, much better sleep with magnesium glycinate and L-theanine, and strength training restarted after a cold.
Week 17
Her digestion was stable and comfortable, with no major symptoms, and she kept her routine going through a demanding stretch at work by preparing meals ahead. She could now eat occasional small amounts of gluten and dairy without significant symptoms, with mild bloating only after heavier restaurant meals.
The real result
That widened tolerance is what matters most. The point of cutting foods out is to need to cut out less later.
What this case shows
When a clean diet has not worked, look beyond the diet, starting with every medicine and supplement you take.
More restriction is rarely the fix
Cutting more foods from a diet that is already gluten-free, dairy-free and whole-food narrows it further, raises the risk of missing nutrients, and leaves the cause untouched.
Bring a full medicine list to every gut visit
Stomach irritation from NSAIDs is common and easy to miss when the complaint is bloating rather than an ulcer or bleeding. The drug was prescribed for a different part of the body, which is exactly why no one connected it to her gut.
A medicine’s job still has to be done
Her clinicians’ taper worked because her pain stayed controlled. Any change to a prescription has to account for why it was prescribed.
Order matters
Gentle support first and a probiotic later, and supplements paused before testing so the results meant something.
In her own words
“Dr. [name withheld] has changed my entire understanding of gut health. She helped heal me when other doctors just tried to give me some pills to put a bandaid on my problems. I’m so grateful for her holistic approach to total health. She is helping me heal in ways I didn’t think were possible.”
About this case study
This case study comes from one person’s clinical record across eight sessions over four months and is published with her consent; her review is quoted with permission. Her name, her clinician’s name, her occupation and identifying contact, location and personal details have been removed or generalized.
It describes one person’s course, not typical results, and nothing here is a guarantee of any outcome. Individual results vary.
Decisions to taper, replace or stop a prescribed medicine rest with the clinician who prescribed it. She was under the care of family medicine, a women’s health nurse practitioner and a gastroenterologist, and her record documents coordination with them. Nothing here is advice to stop a prescribed medicine.
The painkiller is described as the likely cause; endoscopy or biopsy never confirmed it. Post-COVID inflammation, bile flow and malabsorption were possible contributors, not established findings. Results of her gastroenterologist’s testing are not reported here, and nothing here concerns her other medicines.
The supplements named here were specific to her and are not recommendations. This is general education, not medical advice.