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First Reta Phase III Results

52 replies29 peopleDec 11, 2025☆ Follow
Summary

What do the first Phase 3 results for retatrutide show about weight loss, side effects, and comparisons to surgery?

The thread covers trial outcomes showing strong average weight reduction over 68 weeks along with osteoarthritis relief, with doses up to 12 mg. Users note side effects like nausea and dysesthesia that increase at higher doses, and several describe the medication as preferable to bariatric procedures because effects are more reversible. Personal accounts include experiences switching from tirzepatide, maintenance after reaching goal, and observations about dropouts from rapid loss.

What this discussion establishesWhere people disagree

Whether excessive-loss dropouts were mainly psychological reactions from patients and families or tied to starting BMI and study length

Still open

Exact long-term maintenance strategies and full peer-reviewed details beyond the initial press reports

Nothing here is advice.

52 replies · 29 people · page 1 of 2
GreyMeadow99archiveopening postDec 11, 2025

Appreciate you passing that along.

IronWillow10archiveDec 11, 2025

Notable they went with 9 mg rather than 8. Useful detail.

AmberMarble84archiveDec 11, 2025

Outperforms weight loss surgery, glad this came through.

BlueMarble68archiveDec 11, 2025
↳ replying to @AmberMarble84

These drugs tend to have milder side effects overall, and most issues can be reversed unless something rare happens, unlike surgery.

LevelFenwick18archiveDec 11, 2025

Good of you to share this.

CopperLedger37archiveDec 11, 2025

The company announced up to 71 pounds average loss plus osteoarthritis relief in the first Phase 3 success. More specifics should come at a conference or in a paper. Retatrutide looks set to be a major new option, though several other weight loss drugs are likely to follow in the next few years.

CopperLedger37archiveDec 11, 2025
↳ replying to @AmberMarble84

Fewer people will need surgery. Some may still use the medication beforehand and possibly afterward. Surgery becomes less essential overall. Accounts of surgery patients show its side effects are typically harsher than those from these medications.

CopperLedger37archiveDec 11, 2025

Appreciate the results post. One write-up highlights positives and negatives I missed, such as people leaving the study after losing too much weight and some notable side effects.

ClearWillow59archiveDec 11, 2025

Surprising that 1.3 percent on placebo dropped more than 25 percent, and 4.8 percent of placebo users stopped because of side effects. The study ran 68 weeks.

AmberCompass33archiveDec 11, 2025

Just left a subreddit thread that started on this topic but shifted into an argument about steroid users. Reddit can feel like an ADHD group sometimes.

WarmMeadow92archiveDec 11, 2025
↳ replying to @CopperLedger37

These drugs are reducing the need for surgery. My own bypass years ago had manageable side effects, mainly the large loss itself. Surgeons might now combine the medications with procedures for very heavy patients, but I would skip surgery for typical obesity cases if these options had existed earlier.

SlowTimber36archiveDec 11, 2025
↳ replying to @CopperLedger37

I get the dysesthesia effect but the gains far outweigh it.

AmberCompass33archiveDec 11, 2025
↳ replying to @WarmMeadow92

Many regain the weight or more after surgery. With this medication used properly there is room to adjust eating habits instead of being physically restricted.

WarmMeadow92archiveDec 11, 2025
↳ replying to @AmberCompass33

I regained only about 100 pounds from my lowest point rather than everything. Tirzepatide has changed things for me and I am looking forward to trying retatrutide.

CopperLedger37archiveDec 12, 2025

Sounds like the surgery worked out reasonably well for you with solid loss and no major complications, even if more reduction was still desired.

WarmMeadow92archiveDec 12, 2025
↳ replying to @CopperLedger37

I reached about 55 percent of starting weight lost and came close to goal. That was better than average, though keeping it off has been the harder part. Clinical research interests me and I am eager for more retatrutide data, including the Phase 2 NEJM paper.

SlowLedger42archiveDec 12, 2025

Gastric bypass and GLP-1 receptor agonists achieve weight loss through opposite mechanisms. Bypass physically limits intake and cuts vagus nerve signaling so the brain no longer receives direct stomach fullness cues via the GLP-1 route. The medications instead amplify that same pathway to its maximum.

KeenCompass55archiveDec 12, 2025
↳ replying to @CopperLedger37

That dropout pattern seems more psychological and social, with families reacting strongly to the sudden visible change in someone who had been heavy for years.

IronWillow10archiveDec 12, 2025
↳ replying to @IronWillow10

The program tests 2 mg, 4 mg, 6 mg, 9 mg, and 12 mg.

GreyWillow80archiveDec 12, 2025

An open-access paper covers the trial design for obesity, sleep apnea, and knee osteoarthritis using basket methodology, which was new to me.

PlainPebble75archiveDec 12, 2025

Dysesthesia jumps from 8.8 percent at 9 mg to 20.9 percent at 12 mg while other effects stay comparable to earlier drugs. The weight results and osteoarthritis benefit are striking.

PlainCompass54archiveDec 12, 2025
↳ replying to @KeenCompass55

I see something similar with my mother-in-law who has long been very heavy. She lists her health issues but hesitates on the medication despite knowing weight loss would help. Conversations stay careful because the topic is sensitive.

WarmMeadow92archiveDec 12, 2025
↳ replying to @GreyWillow80

The basket design is clever for separating effects on weight, apnea, and osteoarthritis. Weight loss obviously eases knee pain, yet the setup tries to isolate the drug's direct impact.

QuietTimber26archiveDec 12, 2025

I just got my first kit. Tirzepatide at 12.5 mg for nine weeks has stopped working well and sides are worsening, so this pushes me toward switching soon.

IronWillow10archiveDec 12, 2025
↳ replying to @PlainCompass54

Would an oral version make it easier for her to start?

AmberMarble84archiveDec 12, 2025
↳ replying to @CopperLedger37

I see many gastric bypass patients with ongoing pain and complications that cannot be undone, though some do well and diabetes often improves. Still, medication seems preferable when possible.

PlainCompass54archiveDec 12, 2025
↳ replying to @IronWillow10

She already uses injections for diabetes, but starting with research-grade material might not appeal to her.

CopperFenwick68archiveDec 12, 2025

These results are what I was waiting for. I reached goal on tirzepatide, have enough stocked for maintenance, and do not plan to switch. If starting fresh with more to lose, retatrutide would be the choice.

CopperLedger37archiveDec 12, 2025
↳ replying to @KeenCompass55

They were under medical supervision, so the full picture may need the published data.

CopperLedger37archiveDec 12, 2025

The weight loss matched expectations from Phase 2 once the longer duration is considered. Side effects also tracked similarly. It is reassuring that the larger study confirmed the earlier strong findings.

KeenCompass55archiveDec 12, 2025

One participant described quietly skipping doses after feeling too much weight had been lost.

WarmAlder42archiveDec 12, 2025
↳ replying to @QuietTimber26

Why not try the full 15 mg tirzepatide dose before switching, or was that ruled out by the side effects at 12.5 mg? I recently increased and noticed more sides after a smooth period at lower levels.

BrightSignal76archiveDec 12, 2025

Dysesthesia involves spontaneous unpleasant sensations while allodynia is pain triggered by normally non-painful stimuli. They can overlap.

SlowHarbour49archiveDec 12, 2025

The trial ran 68 weeks with 445 people who had obesity and knee arthritis. Participants received either 9 mg or another dose of the drug.

CopperLedger37archiveDec 13, 2025

An article discusses the dramatic weight loss seen in the next-generation trial.

SlowBeacon94archiveDec 13, 2025
↳ replying to @KeenCompass55

That participant behavior concerns me for study integrity. Better verification of dosing would help, and skipping doses selfishly affects the data. It also hints that maintenance needs may be lower than peak trial doses.

GreenAnchor53archiveDec 13, 2025
↳ replying to @CopperLedger37

These outcomes are what I was hoping to see. I have been holding material until the Phase 3 data arrived.

QuietTimber26archiveDec 13, 2025
↳ replying to @WarmAlder42

Sides became hard to manage past 7.5 mg, with very low calorie intake and returning food noise. The plateau started before any other additions. I may test the higher tirzepatide dose once more before deciding.

BrightSignal76archiveDec 13, 2025

I would like access to that placebo for the extra knee pain reduction.

CopperWillow54archiveDec 13, 2025
↳ replying to @KeenCompass55

Hard to trust participants who waste the opportunity and break the agreement. They should face consequences.

CopperWillow54archiveDec 13, 2025
↳ replying to @BrightSignal76

ARA-290 has helped with allodynia in my experience and shows potential for dysesthesia and other nerve pain as well.

BrightSignal76archiveDec 13, 2025

The allodynia is more of a minor annoyance now, especially with gym and snow shoveling discomfort. B vitamins help when I remember them.

RustLantern72archiveDec 14, 2025

Little extra loss between 9 mg and 12 mg suggests we are approaching the top effective dose.

BrightSignal76archiveDec 15, 2025
↳ replying to @RustLantern72

It could also be the highest safe level. Going further might eliminate appetite entirely and lead to dangerous under-eating.

SteadyBramble95archiveDec 16, 2025
↳ replying to @QuietTimber26

Growth hormone compounds increased my hunger and worked against the loss, so I paused them.

QuietTimber26archiveDec 16, 2025
↳ replying to @SteadyBramble95

Thanks. The plateau predates the growth hormone addition. Scale movement is not the main concern, but lack of visible progress is worrying.

NorthAnchor41archiveDec 16, 2025
↳ replying to @KeenCompass55

Trial entry required BMI of at least 27, and those who dropped for losing too much tended to start with lower BMI, which fits the longer study duration.

SharpCompass15archiveDec 16, 2025
↳ replying to @KeenCompass55

Helpful detail. I reached goal on retatrutide and am figuring out maintenance while trying to regain some muscle. Even with adjusted dosing and occasional higher intake I am still below maintenance calories.

ClearTimber11archiveDec 16, 2025
↳ replying to @BrightSignal76

Glad this forum exists. The same sensations appeared during another trial and staff dismissed them. It felt like a mix of both effects but mostly dysesthesia. Tirzepatide has not produced it so far.

AmberCompass33archiveDec 17, 2025
↳ replying to @SlowLedger42

When you say maxing out the signal, do you mean constant hunger or the opposite?

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First Reta Phase III Results · ZyraTrack Community