CommunityFood & Appetite

Stacking Reta with Mazdutide, Cagrilintide or Tirzepatide: Motility Concerns

12 replies11 peopleMay 28, 2026☆ Follow
Summary

Does stacking retatrutide with other GLP-1 agonists risk compounding delayed gastric emptying and constipation?

Users report that cagrilintide can be added to retatrutide for stronger appetite control without universal motility problems. Several note that amylin-receptor action differs from GLP-1 pathways, and constipation remains manageable with fiber, fluids and movement when it occurs. Most advise increasing retatrutide dose before adding another agent unless specific side-effect reasons exist. Alternative compounds are mentioned but quality and response vary widely.

What this discussion establishesWhere people disagree

Whether adding any second GLP-1 agent meaningfully worsens motility beyond what retatrutide alone produces, and whether alternatives like eloralintide reliably avoid GI effects.

Still open

Long-term outcomes and optimal dosing when combining these peptides for maintenance or further appetite control.

Nothing here is advice.

12 replies · 11 people
WarmAnchor59archiveopening postMay 28

Considering mazdutide, cagrilintide or tirzepatide on top of retatrutide to strengthen appetite control. All three hit the GLP-1 receptor and slow stomach emptying just like retatrutide does, so I wonder if the slowing effect could add up when two are used together. Already eat plenty of fiber, drink enough, use prunes, stay active and lift, and stay regular every morning without trouble. Is the worry about getting badly blocked overblown or worth watching?

SlowThistle88archiveMay 28

Fish oil helps keep me regular. Plenty of people stacking retatrutide with cagrilintide report solid results, so I plan to try that if food noise returns after switching from tirzepatide. I usually manage fine once I stay active and eat right; down 32 pounds so far.

SharpBramble33archiveMay 28
↳ replying to @WarmAnchor59 (opening post)

There is a newer option some call a GLP-4 that mainly makes you feel full faster while eating, without broad appetite suppression or GI slowdown. Results vary by person and it is still very new. Oral tesofensine is another possibility with its own trade-offs.

BlueSignal49archiveMay 31
↳ replying to @SharpBramble33

A certificate of analysis exists for that product. Still, tirzepatide continues to work well enough for me.

CopperSignal46archiveMay 31

Currently on 7.5 tirzepatide, 2 retatrutide and 0.25 cagrilintide. No side effects so far and the appetite control feels well balanced without needing to push food down.

CopperSignal27archiveMay 31
↳ replying to @WarmAnchor59 (opening post)

Probably best not to worry until a problem shows up. Constipation is common but far from universal and usually easy to handle. Slow emptying at the stomach does not always cause constipation lower down. Without details on doses, current weight, age, time on retatrutide and so on it is hard to say more. Cagrilintide is the only one on the list that works through amylin receptors; the others overlap with retatrutide pathways, so raising the retatrutide dose first usually makes more sense than adding another agent.

NorthFenwick56archiveAug 3
↳ replying to @SharpBramble33

Some batches of that compound appear to contain no peptide at all, so anyone looking into it should check carefully first.

KeenBramble12archiveAug 3

Running 1.5 mg retatrutide weekly for over twelve weeks and it has helped drop seven pounds that would not budge despite lifting, running and steady steps. Also using GHK-Cu. Planning a twelve-to-fourteen-week break from both to avoid raising the retatrutide dose, then return to it later. During the break want to try low-dose cagrilintide for appetite plus mots-c a few times a week. Anyone combined cagrilintide and mots-c successfully for maintenance?

WarmAnchor59archiveAug 5
↳ replying to @KeenBramble12

Your slow, steady approach and patience are impressive. You will probably do fine with whatever you choose. Looking into ss-31 around the mots-c window could be worth considering. Cagrilintide alone during the retatrutide break may handle appetite well or even better for you.

ClearHarbour45archiveAug 5
↳ replying to @WarmAnchor59 (opening post)

Cagrilintide acts on amylin receptors, not GLP-1, so the targets are different.

WarmAnchor59archiveAug 8

Thanks. Learned more since the first post. Tried a couple of sources for that new compound but both had manufacturing problems. Still waiting patiently; retatrutide has already made a big difference. Keeping up with weights and seeing natural gains from better diet and sleep.

AmberSignal16archiveAug 8
↳ replying to @WarmAnchor59 (opening post)

Stacked for nearly two years without noticing extra motility trouble. It did get me to goal weight. Sometimes ran tirzepatide, retatrutide and cagrilintide together.

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Stacking Reta with Mazdutide, Cagrilintide or Tirzepatide: Motility Concerns · ZyraTrack Community