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Took 3x Dose - FML

13 replies9 peopleApr 8, 2026☆ Follow
Summary

What happens after accidentally taking three times a usual retatrutide dose?

One user who had been on a slow titration schedule injected 7.5 mg instead of 2.5 mg after mixing the wrong vial strength. They managed the next several days with electrolytes, rest, Zofran, and a peptide blend, reporting mainly fatigue, mild nausea, and heartburn but no allodynia. Heart-rate and HRV changes followed the same pattern seen at prior dose increases and recovered faster than expected. Others shared similar labeling or calculation mistakes and offered practical tips that matched the original poster's experience.

What this discussion establishes

Nothing here is advice.

13 replies · 9 people
SteadyLedger82archiveopening postApr 8

I started retatrutide back in January and raised the amount very gradually, even dropping from 3 mg back to 2.5 mg when the higher amount felt rough. I always thought I would never be the person who took more than planned, but that changed today. I needed my usual 2.5 mg shot, mixed a fresh vial while dealing with a cold, and gave myself the dose. Only afterward did I realize I had used a 10 mg vial instead of the 30 mg one I meant to grab. I tried to adjust on the spot and ended up taking 7.5 mg total. I have ginger chews, electrolytes, and Zofran ready and am bracing for the next week or so. When I went from 2.5 mg to 3 mg before, I was off the peptide blend, so I am hoping it helps ease the stomach issues this time.

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BlueAlder28archiveApr 8

Good luck. I did the same thing last week by mixing up units and dose. My mistake left me under-dosed instead. Now every pen gets a clear printed label showing the product, the dose, and the units.

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SteadyLedger82archiveApr 8
↳ replying to @BlueAlder28

Thanks. I was actually reaching for my phone to print a fresh label when I spotted the mix-up. Labels really matter. Another lesson for me is to slow down and avoid multitasking when I am not feeling well. Appreciate the shared story.

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CopperAlder51archiveApr 8

You will probably be constipated for a bit, but you should be okay. Smart move having electrolytes on hand.

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SharpAlder17archiveApr 8

At first I labeled vials with numbers like 12:240 or 10:100, but my brain would skip the details and just guess. Now I use simple ratios like 1:10 or 1:20. I do not track how many doses are left; I just use it until it is gone. The label should say mg per unit, otherwise the math goes way off.

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SteadyLedger82archiveApr 8
↳ replying to @SharpAlder17

My usual labels list the medication name, the concentration such as 10 mg per ml, the unit math like 10 units equals 1 mg, and the date mixed. A label would not have prevented this mistake though; it came down to rushing and not paying attention while I had a cold, plus maybe a bit of overconfidence.

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PlainQuill53archiveApr 9

Good luck. The last time I overshot a little I threw my back out from nonstop projectile vomiting, but that was with tirzepatide, not retatrutide.

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SteadyLedger82archiveApr 9

Day two: appetite is gone, nausea is present but Zofran keeps it in check. I took the day off and have been resting while watching old episodes of Designing Women. My cold actually feels better today too. The highest blood level should hit in a few hours, but so far the climb has not brought anything new. I have managed a few bites of Greek yogurt every couple of hours. Still moving forward. Thanks to everyone who replied with ideas and support. The tracking app shows I am at peak right now.

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PlainAlder11archiveApr 9
↳ replying to @SteadyLedger82

Are you a female?

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ClearKettle85archiveApr 11

Any heart-rate changes from the larger amount?

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QuietAnchor73archiveApr 11
↳ replying to @SteadyLedger82

That looks like a steep climb from here. A couple days have passed since the last update; hoping everything is okay.

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WryCompass65archiveApr 11
↳ replying to @SteadyLedger82

I just got my label maker and this approach feels the most straightforward. I also add how often the dose should be taken.

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SteadyLedger82archiveApr 11
↳ replying to @ClearKettle85

I have been watching my resting heart rate and heart-rate variability more closely since starting in January. Before that my numbers were all over the place from poor eating and too much alcohol. Once I improved my diet and lost interest in drinking they settled into a steady range by early February. With retatrutide I notice that after each weekly shot my HRV drops and resting heart rate rises, then both return to normal before the next injection. The biggest shift happened when I moved from 2.5 mg to 3 mg while off the peptide blend; I felt rough for two weeks even after dropping back down. With this three-times dose the usual dip and recovery happened, and by day three my HRV was already above baseline again. I slept poorly the first two nights and the watch flagged a higher heart rate.

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SteadyLedger82archiveApr 11

Day four now. Still tired and dealing with some heartburn, but sleep is improving. The side effect I worried about most, skin pain, never showed up. I plan to skip next week and restart at 2.5 mg the Wednesday after. If anyone ends up in the same spot, the things that helped most were keeping electrolytes in water bottles and sipping often, resting as much as possible, not being hard on myself, lying on the right side for digestion or left side for heartburn, and continuing the peptide blend, which seemed to limit stomach and inflammation issues enough that I will not raise the dose without it.

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