CommunityInjection Technique

I combined retatrutide with tesamorelin/ipamorelin, and this happened.

13 replies10 peopleFeb 27, 2026☆ Follow
Summary

Is it safe to mix retatrutide with tesamorelin/ipamorelin in one vial or dose them minutes apart on the same day?

Users report that combining these peptides in a single vial produces instant gelling or sludge. Most advise against mixing GLPs with other peptides in the same syringe or vial, though separate injections on the same day at different sites appear common without immediate issues. One user noted a similar accidental gelling when trying to reconstitute semaglutide with another mixture. Recommendations include spreading injections to lower endotoxin load and avoiding combinations that risk immune reactions.

What this discussion establishesWhere people disagree

Whether a compatibility chart based on clinic practices is reliable enough to guide mixing decisions.

Nothing here is advice.

13 replies · 10 people
NorthAnchor68archiveopening postFeb 27

Hi all, I combined tesamorelin and ipamorelin with retatrutide inside one vial to cut down on the number of shots, and the reaction happened right away. This makes me wonder whether it is okay to give tesamorelin/ipamorelin and retatrutide within minutes of each other or even on the same day.

GreyBeacon50archiveFeb 27

Just keep them out of the same syringe and avoid injecting into the exact same spot and you should be fine.

SharpCinder28archiveFeb 27
↳ replying to @NorthAnchor68 (opening post)

Yes. Keeping the endotoxin load as low as possible is why I spread my injections across different times of day.

BrightMeadow15archiveFeb 27

Using different sites would stop them from mixing right at the injection point. Someone has probably tried dosing them the same day with separate shots. Nice sludge by the way.

ClearBeacon24archiveFeb 27
↳ replying to @NorthAnchor68 (opening post)

From what I understand you should never mix anything besides another GLP-1 in the same syringe. When I first started I tried putting MOTS-c and a GLP-1 together in one syringe and it turned solid.

SharpCinder28archiveFeb 27
↳ replying to @NorthAnchor68 (opening post)

If you prefer not to use pens, the small insulin syringes available at the pharmacy work well for me.

PatientAnchor52archiveFeb 27
↳ replying to @BrightMeadow15

I have given them within minutes of each other before, but on opposite sides of my abdomen.

NorthAnchor68archiveFeb 27

I was planning to mix MOTS-c and BPC-157 next.

SharpCinder28archiveFeb 27
↳ replying to @NorthAnchor68

The heat is already building here and it makes clear thinking tougher. MOTS-c tends to be one of the peptides more likely to trigger a systemic immune response like anaphylaxis, especially with IM use. Adding anything else to it, even just in the syringe, could raise that risk further.

CopperMarble25archiveFeb 27
↳ replying to @NorthAnchor68 (opening post)

Those compounds aren't intended for combination with others inside one container or injection tool. I've combined various additional substances as part of my usual daily schedule without running into any problems.

CopperMarble25archiveFeb 27

This chart is a good resource for which peptides can or cannot be mixed.

QuietAlder25archiveFeb 27

I got the same gelling result when I accidentally tried to reconstitute semaglutide using my glutathione and vitamin C mixture. The vials were almost identical in size. That was my worst peptide mix-up so far, but at least it gelled instead of staying liquid.

CopperAlder51archiveFeb 27
↳ replying to @CopperMarble25

The chart is anecdotal and reflects what clinics were supplying at the time it was made, so it is not a strong endorsement. I take it lightly. As a personal rule I avoid mixing any peptides in the same syringe, though I have occasionally combined things in the same vial after reconstitution.

BlueMeadow15archiveFeb 28
↳ replying to @CopperMarble25

Thanks, the chart will be useful. I am surprised GHK-Cu shows up as that compatible given how reactive copper can be.

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I combined retatrutide with tesamorelin/ipamorelin, and this happened. · ZyraTrack Community