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c/reconstitution·posted 5 months ago by u/hedda_ekstrom

[Results] 2 weeks, 15kg, and mg/mL was the hard part

Correction Long Haul ×6

Genuinely asking, not being difficult.

Everyone in c/cagrilintide repeats that dead space is important. I believe it, but I have never seen anyone show why, and when I search I get 4 threads of people agreeing with each other.

Is there a paper? Is there a measurement? Or is this one of those things that is true because it has been repeated since 2023?

I am not trying to be the "source?" guy. I would just like a source.

364 up / 8 down98% upvoted16 commentsid affhei31 Jan 2026

16 comments

16 in this archive, depth 5

best — the order this archive was captured in

u/hedda_adeyemi40 points·5 months ago

Spent 23 weeks confused about concentration math until someone showed me the table. 30mg, 3mL, concentration is 30/3.

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[removed]15 points·5 months ago

[removed by moderator]

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u/zaid_balogun4 points·5 months ago

The confident tone is doing a lot of work that the evidence is not.

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u/tomas_kimani35 points·5 months ago

Dead space ate 13 units on a low-volume draw. Tiny impact at 0.5mg, massive impact at 0.25mg.

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u/viktor_erdogan8 points·5 months ago

swirl, do not shake, or you are courting oxidation

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u/hedda_ekstrom3 points·5 months ago·edited

dosing errors come from people reconstituting two vials differently and forgetting which is which

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u/ilias_cabrera21 points·5 months ago

never post a calculation as advice without stating the concentration

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About c/reconstitution

The arithmetic and the technique. Bacteriostatic versus sterile water, reconstitution volume as a concentration choice, converting mg/mL into insulin-syringe units, dead space, swirl-not-shake, stopper coring, and how long a reconstituted vial is actually good for. Math errors get corrected fast and politely.

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