CommunityDosing & Titration

Stacking Tirz and Reta experiences

25 replies16 peopleDec 27, 2025☆ Follow
Summary

What dosing approaches work when people combine tirzepatide and retatrutide?

Users describe various weekly combinations such as 5 mg tirzepatide with 8 mg retatrutide or lower tirzepatide paired with gradually rising retatrutide. Some add the second medication to restore appetite control or ease side effects after one alone stops working well. Others report continuing both because they already have supply of the first and want to test the second slowly. A few note that retatrutide alone eventually replaces the first drug once doses reach the middle range.

What this discussion establishesWhere people disagree

Whether retatrutide alone is sufficient or whether stacking provides clear extra benefit.

Still open

Long-term outcomes and the best final maintenance doses when both are used together.

Nothing here is advice.

25 replies · 16 people
AmberCompass48archiveopening postDec 27, 2025

I realize this topic has been covered many times, but I still want input from people I already know here rather than strangers elsewhere. I am currently using 6 to 7.5 mg of tirzepatide on Friday nights and have started adding 2.5 mg of retatrutide on Monday nights for the first month. I may raise the retatrutide later while lowering the tirzepatide. My goal is to get the advantages of both compounds even though some sources advise against combining them.

SlowBramble61archiveDec 27, 2025

I do not see the reason to combine them. From everything I have come across, retatrutide covers the same ground as tirzepatide and may do it better while preserving more muscle, so a higher dose of retatrutide alone should be enough.

AmberCompass48archiveDec 27, 2025

Thanks, but I am really hoping to hear from people who have actually tried both and preferably from users on this board I have already talked with. I can name a few whose posts I have followed and enjoyed. This is not because the current approach has failed; it is more about testing the combination for myself.

AmberSignal16archiveDec 27, 2025
↳ replying to @AmberCompass48 (opening post)

I have been running both for more than a year now. My weekly amounts are 5 mg tirzepatide together with 8 mg retatrutide. I am currently two pounds below my target weight.

AmberCompass48archiveDec 27, 2025
↳ replying to @AmberSignal16

Thanks, and congratulations on hitting your goal. What made you decide to combine the two in the first place? I still have quite a bit left to lose myself.

ClearBeacon24archiveDec 27, 2025
↳ replying to @SlowBramble61

Tirzepatide affects the hunger signals more strongly than retatrutide does. I am also using 5 mg of the first with 8 mg of the second each week.

SteadyQuill55archiveDec 27, 2025

I combine tirzepatide with another compound and have noticed a big drop in the tiredness and lack of motivation I used to feel. My approach was not very methodical because I was also running other protocols at the same time, so I cannot say exactly which change helped most.

SteadyLedger49archiveDec 27, 2025

I have been taking 10 mg tirzepatide for roughly a year. Two months ago I began adding 1 mg retatrutide on a different day of the week. I plan to raise the retatrutide slowly to 2 mg and beyond as long as side effects stay manageable. The only reason I am keeping the tirzepatide is that I already paid for a year's supply.

QuietTimber26archiveDec 27, 2025

After nine months I reached 12.5 mg tirzepatide, but progress stopped around the 7.5 mg level and then reversed. Higher doses brought strong side effects and no consistent loss. I recently added retatrutide at 2 mg and have taken a second dose since. I am still deciding how to adjust the two together going forward.

AmberCompass48archiveDec 27, 2025
↳ replying to @QuietTimber26

I have heard that the other growth-hormone peptides can help break stalls too. Glad to hear you are moving again.

WarmQuill37archiveDec 27, 2025

I have not used tirzepatide but I do combine two GLP-1 medicines. The key seems to be raising doses in small steps and never increasing both at once.

AmberCompass48archiveDec 27, 2025

Thanks. I will start low and go slow. Part of the current situation is holiday food being everywhere, so I expect things to settle once the routine returns next week.

KeenFenwick47archiveDec 27, 2025

I add a small amount of semaglutide to my tirzepatide and it works well for me. The chart I saw shows semaglutide has the strongest effect on the GLP-1 receptor, followed by tirzepatide, then retatrutide. That is why I use a little semaglutide a couple of days after my tirzepatide shot to improve appetite control.

SlowSparrow58archiveDec 27, 2025
↳ replying to @KeenFenwick47

That chart is interesting. I have used both tirzepatide and semaglutide but never together, so I am saving the information.

AmberSignal16archiveDec 27, 2025
↳ replying to @AmberCompass48

Tirzepatide left me feeling very cold, so I could not keep raising it. I switched to low-dose retatrutide and built up slowly. Later I added a small amount of tirzepatide back because joint pain returned. My current schedule spaces the doses across the week and includes a little of a third compound on one day.

QuietTimber26archiveJan 7

Last week I used about 6 mg tirzepatide with 4 mg retatrutide. This week the tirzepatide is 4.8 mg and I will repeat the 4 mg retatrutide. Next week I plan to drop tirzepatide to 2.5 mg and raise retatrutide to 6 mg. I am increasing the retatrutide fairly quickly but feel fine on the lower tirzepatide amount. Once I reach 8 mg retatrutide I may stop the tirzepatide and see how it goes.

SharpLantern61archiveJan 7

If someone is already at 15 mg tirzepatide and wants to move to retatrutide because progress has stopped, should they begin with the lowest retatrutide dose?

CopperSignal27archiveJan 8

How cautious the switch needs to be depends on age and other health conditions. For a healthy younger person the suggestion is to move to 5 mg retatrutide on the next scheduled day without a washout period. After that, adjust based on any side effects that appear and how quickly the new dose controls hunger.

PatientAnchor11archiveJan 8
↳ replying to @SteadyLedger49

Is there any way to set aside part of the tirzepatide supply instead of using it all?

SteadyLedger49archiveJan 8
↳ replying to @PatientAnchor11

That will not work because the tirzepatide comes as a refrigerated liquid each month.

PatientAnchor11archiveJan 8
↳ replying to @SteadyLedger49

I move my monthly supply into one cartridge and keep it in the refrigerator. Some people here mention freezing reconstituted versions for long storage, though I have not tried that myself.

WarmHarbour28archiveJan 9

The brand-name liquid versions have no preservative yet stay good for a while if kept cold and unopened. Reconstituted material can usually be frozen only once. We all take a few shortcuts sometimes.

WarmAlder92archiveJan 9
↳ replying to @PatientAnchor11

Do not put a pen in the freezer because the mechanism can break. Vials are easier to handle or you can transfer the contents after opening the pen. I learned this the hard way.

AmberMarble84archiveJan 9

I used both while lowering one and raising the other because they act on the same receptors. I reached good appetite control on 6 mg retatrutide and am now at 8 mg. I would suggest moving to retatrutide alone and tapering the tirzepatide down rather than continuing both.

AmberSignal16archiveJan 10
↳ replying to @QuietTimber26

When I reached 8 mg retatrutide I stopped the tirzepatide completely, but joint pain came back so I added 2.5 mg tirzepatide again and lowered the retatrutide to 6 mg. I also use a small amount of another compound on certain days.

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Stacking Tirz and Reta experiences · ZyraTrack Community