Hi everyone, could use some advice. Taking Reta at 3 mg twice a week in month three. Four days ago diarrhea started suddenly with no dose change. I suspect bad food rather than the medication. Still able to eat and drink water plus electrolytes normally, yet it has not improved. Any ways to speed recovery? Does activated charcoal or enterosgel make sense?
Reta and diarrhea
Summary
Does retatrutide cause diarrhea and how to manage or stop it while staying on the medication
Users report sudden diarrhea that may stem from food, the drug itself, or their combination, with recovery taking days to weeks. Some stop or lower the dose to test causation and find symptoms resolve, while others add fiber, probiotics, peppermint, or Imodium with mixed results. Constipation is the more common complaint for many, leading some to prefer occasional diarrhea. The original poster suspects bad food but notes Reta may slow recovery, and several others confirm similar patterns at higher doses.
What this discussion establishes- Diarrhea can appear without dose increases and may persist even after suspected food triggers
- Lowering dose, splitting injections, or pausing Reta often stops symptoms for those who test it
- Soluble fiber like psyllium, probiotics, and hydration help some but worsen issues for others
- Imodium and BRAT diet give limited relief for GLP-related cases compared to food poisoning
- Diet changes toward whole foods or lower fat reduce episodes for multiple users
Whether the diarrhea is primarily from Reta, from something eaten, or only from their interaction; also whether fiber helps or harms during active symptoms
Still openBest long-term strategy for continuing Reta without GI issues returning, and whether stacking or very slow titration reliably prevents recurrence
Nothing here is advice.
38 replies · 26 people
Fiber and water, wait an hour, then probiotics with yogurt, wait another hour, then fiber and water again.
Skip the next shot and wait. If symptoms stop, resume and see if they return. That confirmed Reta as the cause for me after three days of heavy diarrhea, even though I could still eat, drink, and function between bathroom trips.
Diarrhea hit me on both tirzepatide and retatrutide once I went past the highest dose I could handle, which was 5 mg weekly for each. Even at that level it stayed manageable but constant, so I paused all GLP-1s for several weeks. After three weeks it cleared completely. Five weeks later I restarted tirzepatide at 2.5 mg and remain diarrhea-free so far.
I had the opposite problem so badly I saw a doctor. She said I was being dramatic, but those few days were frightening. Strange how this medication flips between extremes.
Honestly I still think something I ate triggered it rather than the GLP-1s, though Reta might be slowing recovery. I do not want to stop right now. Last injection was today and the half-life means it stays around for three or four weeks anyway. At first it felt like something urgent had to come out, the same reaction I get from less-than-fresh food.
↳ replying to @SlowLedger31
It's hilarious how the physician pointed out your flair for exaggeration.
Maybe this is not helpful, but I would rather deal with diarrhea than constipation.
↳ replying to @SlowAnchor19
Constipation hit me the first month on reta. The difference is you can still live normally with it and just deal with the occasional diamond when you need the toilet. With diarrhea I cannot leave the apartment to get anything done, like the yearly car inspection that takes an hour and a half here in Bulgaria with no customer restroom available.
Anything that tastes good sets off diarrhea while I am on Reta.
On my very first 0.5 mg pin I thought I had food poisoning and could not sleep for three nights because of stomach cramps. The same thing started again with the second dose, so I figured it out.
Besides soluble fiber and probiotics, KPV and BPC might help along with lowering fat in meals and splitting doses. Imodium plus the BRAT diet can work for sudden cases, though Imodium did little for my tirzepatide diarrhea. In really bad situations a pain clinic micro-dose of opioids can slow things, or kratom as an OTC option despite heart risks.
↳ replying to @BrightBramble77 (opening post)
Something similar happened to me after eating cold cooked chicken, leading to two days of awful bloody diarrhea. For the next three or four weeks I kept getting diarrhea after meals or even hot drinks. Reta can heighten stomach sensitivity and that plus food poisoning made recovery slow. Dropping from 2 mg to 1.5 mg did not fully fix it, but peppermint tablets before meals helped a lot. Hoping the stomach settles soon.
Lots of useful info here. In my experience the runs only appear when I eat poorly. Since starting I switched to cooking at home with whole foods. Going off plan for greasy late-night food is exactly when the fireworks start.
↳ replying to @SlowAnchor19
Same here. Constipation is my worst side effect on reta. Never thought I would envy people who get diarrhea.
↳ replying to @SteadyQuill58
Thanks. Many suggested fiber but it felt like glass and was too sharp. I looked into it and the issue seemed tied to fermentation from carbs I had not eaten in a while plus some Coke. Before that I was on carnivore and adding those foods made it worse. Today I stuck to boiled eggs, hot tea, electrolytes, and plain water and have not needed the toilet since morning. Trying to avoid processed items, but I still cannot pinpoint the bad meal, possibly the mussels or the neighbor's plov. One upside is my BMI finally dropped below 40.
I read about handling stomach troubles while on GLP meds. One part mentioned inspecting the browser captcha setup. The details on loose stools came from that writeup as well.
Fiber is usually the wrong choice during diarrhea except for psyllium husk, which may reduce it but is not ideal for acute cases. As long as there is no fever, feeling ill, or blood, it should settle on its own. Four days is longer than typical food poisoning but not unheard of. Keep fluids up with oral rehydration solutions if possible. Eat smaller amounts of whatever sounds good rather than forcing big meals.
Reta caused this for me. Cycling between tirzepatide and retatrutide over multiple six-month periods showed the issue only on reta at 9 mg weekly or higher, and it disappeared when switching back to tirzepatide. Lower doses of 1-4 mg were fine. Mental effects were the real reason I stopped reta. Considering higher tirzepatide with 1-3 mg reta next.
↳ replying to @IronLantern24
I am the same and would welcome some diarrhea for a change. This constipation will not leave and I did not expect it to hit so quickly.
↳ replying to @ClearSignal10
Microdosing Miralax is the only thing that has really worked for me.
↳ replying to @IronLantern24
Trying Miralax and the fast chewables but not much improvement yet. Motility is also an issue because of long hours sitting at work and neuropathy in my feet that makes walking uncomfortable. Gym three times a week does not replace daily movement. Trying not to overload the gut with too many products, though I have some KPV on hand.
Reduce the Reta dose and switch from twice weekly to once.
↳ replying to @ClearSignal10
A doctor can offer reasonable options for constipation with less added pain. Osmotic laxatives like lactulose tend to be gentle and effective. Long-term the right fiber amount helps, and psyllium is common though it sometimes worsens symptoms.
↳ replying to @PlainLedger10
Already discussed this with my gastro after a recent colonoscopy. Advice was Miralax three times a week plus chewables, soluble fiber or foods, smaller meals, more movement, and plenty of fluids while avoiding most other laxatives. Fleet enema if needed. Planning to add chia seeds.
My suspicion is that reta mixed with whatever meal you had is behind this.
↳ replying to @ClearSignal10
Could you do floor exercises? Yoga or Pilates moves that aid digestion, or even lying on your back and air-bicycling, might help.
↳ replying to @BrightBramble77 (opening post)
The booty squirts and sulphur burps appeared at 4 mg. Dropping back to 2 mg cleared them. Psyching myself up to try 4 mg again this week.
↳ replying to @SteadyCompass90
This is a good reason not to follow standard dose increases. Gut effects often improve slowly over time, so unless months have passed since the last 4 mg attempt the same reaction is likely. Trying 3 mg or splitting into two 1.5 mg or 2 mg doses per week makes sense.
Booty Squirt & the Sulphur Burps would be a great band name.
↳ replying to @PatientPebble79
Pretty sure the office would not appreciate me getting on the floor for yoga or Pilates.
↳ replying to @ClearSignal10
I was not suggesting you try these exercises at work.
↳ replying to @CopperQuill49
Did symptoms ever improve or did you switch GLP-1s? I moved from tirzepatide to reta and it keeps happening even at 0.5 mg, so I may go back to tirzepatide.
This is my go-to when I need diarrhea to stop, especially if food-related. The version with gas relief makes a noticeable difference for some reason.
↳ replying to @GreyLantern71
Imodium does nothing for my severe GLP-related diarrhea. Low-dose opioids from a pain clinic finally worked during reta titration, though I did not consider it during most of my time on tirzepatide.
Probably diet issues. Reta has been smooth for me all the way to 6 mg weekly.
↳ replying to @BrightCompass57
I can still get severe diarrhea on any GLP even while on a low-fat BRAT diet.
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