Zepbound (Tirzepatide) Diarrhea: Diet Protocols That Help
At a glance
- Diarrhea on Zepbound / 19% (5 mg), 21% (10 mg), 23% (15 mg) vs 8% on placebo [4]
- Any GI adverse reaction / 56% at every Zepbound dose vs 30% on placebo [4]
- Stopped for a GI reason / 1.9% (5 mg), 3.3% (10 mg), 4.3% (15 mg) vs 0.5% [4]
- Lactose / diarrhea after lactose depends on the dose ingested by people who malabsorb it [1]
- Caffeinated coffee / raised colonic motor activity in 12 healthy adults; decaffeinated coffee was not significantly different from water [2]
- Soluble fiber / eased global IBS symptoms in a meta-analysis; insoluble fiber did not [3]
How common is diarrhea on Zepbound?
In the pooled weight-management trials (958 patients on placebo; 630, 948 and 941 on 5, 10 and 15 mg), diarrhea was reported by 19%, 21% and 23% versus 8% on placebo, and 1.9%, 3.3% and 4.3% stopped treatment for a GI reason versus 0.5% [4].
Which food changes have some evidence?
Lactose. A review of lactose malabsorption describes diarrhea, bloating and abdominal pain after lactose in people who malabsorb it, with the likelihood depending on the dose, lactase expression and the gut microbiome [1]. The review lists a low-lactose diet and lactase supplements as treatments for lactose intolerance and describes the clinical outcome as modest [1]. This was not studied in Zepbound users.
Coffee. In 12 healthy adults, caffeinated coffee (150 mg caffeine) stimulated colonic motor activity at a magnitude similar to a 1,000-kcal meal, 60% stronger than water and 23% stronger than decaffeinated coffee; decaffeinated coffee was not significantly different from water or from caffeinated coffee [2]. The study measured colon contractions, not stool output.
Soluble fiber. A meta-analysis of 22 randomized trials in IBS found soluble fiber improved global symptom assessment (risk ratio 1.49, 95% CI 1.09 to 2.03) and abdominal pain, while insoluble fiber improved no outcome [3]. Those trials were in IBS.
What the label says about a dose that is not tolerated
The label starts at 2.5 mg weekly for 4 weeks, then 5 mg, with later increases in 2.5 mg steps after at least 4 weeks at the current dose, a schedule it says is intended to reduce GI adverse reactions [4]. The 2.5 mg dose is for initiation only, and if a maintenance dose is not tolerated the label says to consider a lower one [4].
What the label ties to diarrhea
Postmarketing reports of acute kidney injury, some needing hemodialysis, occurred mostly in patients whose GI reactions such as diarrhea led to dehydration; the label calls for monitoring renal function in patients reporting reactions that could lead to volume depletion, especially during initiation and escalation [4]. It also says to discontinue Zepbound if pancreatitis is suspected [4].
Frequently asked questions
Which foods have evidence for Zepbound diarrhea?
How common is diarrhea on Zepbound?
Can fiber help tirzepatide diarrhea?
What does the label say if a Zepbound dose is not tolerated?
References
- Misselwitz B, Butter M, Verbeke K, Fox MR. Update on lactose malabsorption and intolerance: pathogenesis, diagnosis and clinical management. Gut. 2019;68(11):2080-2091. Update on lactose malabsorption and intolerance: pathogenesis, diagnosis and clinical management
- Rao SS, Welcher K, Zimmerman B, Stumbo P. Is coffee a colonic stimulant?. Eur J Gastroenterol Hepatol. 1998;10(2):113-8. Is coffee a colonic stimulant?
- Nagarajan N, Morden A, Bischof D, King EA, Kosztowski M, Wick EC, et al. The role of fiber supplementation in the treatment of irritable bowel syndrome: a systematic review and meta-analysis. Eur J Gastroenterol Hepatol. 2015;27(9):1002-10. The role of fiber supplementation in the treatment of irritable bowel syndrome: a systematic review and meta-analysis
- U.S. National Library of Medicine, DailyMed. Zepbound injection (tirzepatide) prescribing information. Zepbound injection (tirzepatide) label