The Peptide CommonsEst. May 2024
Independent. We sell nothing and are affiliated with no manufacturer or pharmacy. Every moderation action is logged in public
Topic summary

Gauge and length selection for subcutaneous injection

This is a generated summary. It shows the 8 most-liked posts from a topic of 56, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.
NV
n.vogelTL221 May 2025#1

Gauge and length selection for subcutaneous injection Writing it up because I had to work it out twice and would rather nobody else did.

A follow-up question about gauge and length selection that I did not know to ask the first time.

The earlier thread answered what I asked. What I should have asked is below, and I think it is the one that matters.

41 likes 14mo
HM
h.mbekiTL215 Jun 2025#5
owen.brady, post #4: Gauge and length selection: I have looked for the primary source twice and failed twice. Either it does not exist or it is somewhere I do not know to look, and I would like to know which. Go to post

This is the answer, and the reason it is the answer is the more useful part.

30 likes in reply to #4 13mo
AL
a.lindholmTL2 Solution20 Jun 2025#6

Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.

Noting that I have skin in this question and have tried to discount for it.

15 likes 13mo
M
MSaarinenTL3Regular23 Jul 2025#14
h.mbeki, post #5: This is the answer, and the reason it is the answer is the more useful part. Go to post

Post #12 describes the usual case. This is about the unusual one.

U-100 means the barrel is graduated for a solution containing one hundred units of insulin per millilitre. For anything that is not insulin, the units are simply hundredths of a millilitre.

23 likes in reply to #5 12mo
MA
mi.almeidaTL220 Aug 2025#22

Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.

31 likes 11mo
SP
s.poulsenTL3Regular6 Sep 2025#27
n.vogel, post #1: Gauge and length selection for subcutaneous injection Writing it up because I had to work it out twice and would rather nobody else did. A follow-up question about gauge and length selection that I did not know to ask the first time. The earlier thread answered what I asked. What I should have asked is below, and I think it is the one… Go to post

Same experience here, different supplier, so it is at least not unique to one of them.

22 likes in reply to #1 11mo
PA
p.amankwahTL212 Sep 2025#29

Having read the whole gauge and length selection thread before replying: the question in the first post has not actually been answered yet, and three of us have answered a nearby one instead.

32 likes 10mo
VD
vial_deskTL3Regular28 Sep 2025#34

U-100 means the barrel is graduated for a solution containing one hundred units of insulin per millilitre. For anything that is not insulin, the units are simply hundredths of a millilitre.

33 likes 10mo

Read the full topic (56 posts)

Suggested topics

TopicParticipantsRepliesViewsActivity
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters — setting out what I have, and where I think it stops being reliable. A follow-up question about 0.3 ml versus 0.5 ml that I did not know to ask…
KABVRCTAK+104 114 6k 6d
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters
On the subject in the title: 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Working notes rather than a conclusion. A follow-up question about 0.3 ml versus 0.5 ml that I did not know to ask the…
MKBPNHAAV+108 124 27k 2mo
About the Syringes & needles category
Insulin syringe graduations, dead volume, gauge and length selection, and reading units correctly. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is recorded…
DOOBAFMICB 4 45k 1mo
Fixed versus detachable needles: the trade-offs
Posting this under the heading it deserves: Fixed versus detachable needles: the trade-offs Everything below is what sits behind that. I was wrong about fixed versus detachable needles in a thread last spring…
HNAVPWSMRD+117 121 7.3k 18mo
Reading U-100 graduations, with a conversion table — one year on
Reading U-100 graduations, with a conversion table — one year on Writing it up because I had to work it out twice and would rather nobody else did. I would like to disagree carefully with the settled view on…
AICDSBGHNN+3 7 662 4mo

Related topics — sharing the tags syringe units, needle gauge & length, worked example

TopicParticipantsRepliesViewsActivity
Why we ask for units every single time, with three examples of what goes wrong
Why we ask for units every single time, with three examples of what goes wrong — that is the question, and I have not found it answered plainly anywhere I have looked. Counting it rather than describing it,…
WPAAGLNOPI+115 135 2.2k 11d
Second pass at: Pen dose counters: what a click does and does not guarantee
Second pass at: Pen dose counters: what a click does and does not guarantee — setting out what I have, and where I think it stops being reliable. Two things I would like separated before anyone answers on Pen…
LPOVMDNNKP+63 68 51k 13mo
Revisiting: What to include when your question involves arithmetic
Revisiting: What to include when your question involves arithmetic — setting out what I have, and where I think it stops being reliable. Counting it rather than describing it, because the count is the part…
GRTTJCJSLC+21 25 384 12mo
Over-dilution: when your dose falls below one readable graduation
On the subject in the title: Over-dilution: when your dose falls below one readable graduation Working notes rather than a conclusion. I have read the maintained page on this and I still have a gap, so I am…
KKAAAWMMKS+15 19 248 15mo
A pen that felt like it delivered nothing: diagnosing it afterwards
On the subject in the title: A pen that felt like it delivered nothing: diagnosing it afterwards Working notes rather than a conclusion. Question about a metering device rather than about a syringe, because…
AZFWDSRFOO+35 39 584 6mo