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c/reconstitution·submitted 3 months ago by u/ahmed_rasmussen

[Discussion] bacteriostatic water is doing more work than we give it credit for

Discussionbranch of 8 comments

Quick one. Canada here. concentration works very differently where I live than in the threads that dominate the front page, and I keep seeing people confidently given advice that simply does not apply outside the US. Specifics: the route I used took 24 weeks and cost roughly what I expected. The admin was worse than…

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8 comments, started 3 months ago
u/aleksi_lehtinen7 points·3 months ago

u-100 syringe, not u-40, or your math is off by factor of 11

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u/ahmed_rasmussen6 points·3 months ago·edited

Cored the stopper on my 17th draw because I kept using the same entry point. Rotate the puncture site.

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u/andres_sorensen5 points·3 months ago·edited

10mg vial, 2mL water, concentration is 10/2 — write it on the vial afterwards

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u/georgi_adebayo5 points·3 months ago·edited

dead space is real and the syringe matters

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u/soren_zamora2 points·3 months ago·edited

dead space is real and the syringe matters

Disagree on that part. 99.0% and 98.9% on the same vial is normal.

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u/oskar_ibarra1 point·3 months ago

swirl, do not shake, or you are courting oxidation

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u/ilias_steiner4 points·3 months ago

Spent 2 weeks confused about concentration math until someone showed me the table. 15mg, 3mL, concentration is 15/3.

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u/yusuf_achebe2 points·3 months ago·edited

The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.

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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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