u/erez_perrin
Contributes reviews on supplier material. Based in Córdoba.
member · joined 12 Mar 2025
Comments — page 2 of 2
comment on [Question] reconstitution — what am I missing here in c/reconstitution · 3 points · 1 year ago
Careful — that arithmetic is wrong. 15mg in 3mL is 5mg/mL, so 0.75mg draws to 15 units, not what you wrote.
comment on [Discussion] can we stop arguing about mg/mL until somebody posts a number in c/reconstitution · 39 points · 1 year ago
the number you write down is the number you will trust at 6am
comment on someone explain insulin syringe to me like I have not read a paper in years in c/reconstitution · 49 points · 1 year ago
Adding more water does not change how much peptide is in the vial. It changes the concentration, which changes the volume you draw for the same amount. That is the entire relationship.
comment on [Results] 45 weeks, 14kg, and beginner was the hard part in c/newbiequestions · 3 points · 2 years ago
Same. The injection was the thing I was most nervous about and the thing that turned out to matter least.
comment on unpopular opinion: most of what gets said here about TGA is guesswork in c/glp1aus · 25 points · 2 years ago
That is a pharmacy-level stock issue rather than a national supply issue. They feel identical and are not.
comment on what changed for me between month 4 and month 12 in c/newbiequestions · 140 points · 2 years ago
Not quite. Bacteriostatic and sterile water are different products and only one is intended for repeated entry.
comment on week 68 check-in — 34kg down, nausea manageable, one thing confusing me in c/cagrilintide · 7 points · 2 years ago
the co-agonism argument is about complementary mechanisms
comment on unpopular opinion: most of what gets said here about reconstitution is guesswork in c/reconstitution · 366 points · 2 years ago
The lyophilised cake displaces a small volume, so the true concentration is very slightly lower than the arithmetic suggests. It is a fraction of a percent and it is dwarfed by fill tolerance.
comment on normal: what the trials say vs what this community says in c/newbiequestions · 285 points · 2 years ago
the starting dose is not meant to be the dose that works
comment on small win: cagrilintide stopped being a problem at week 60 in c/cagrilintide · 20 points · 2 years ago
Combination and monotherapy arms must be read separately. Efficacy and tolerability both differ substantially between them and summaries routinely blur the two.
comment on the basics question that gets asked weekly, answered properly in c/newbiequestions · 1 points · 2 years ago
the injection is easier than you are imagining
comment on bacteriostatic water — 16 things I got wrong before I got it right in c/reconstitution · 1 points · 2 years ago
swirl, never shake
comment on genuine question about reconstitution that I am slightly embarrassed to ask in c/reconstitution · 47 points · 2 years ago
Started reconstituting everything to a round concentration and the six-in-the-morning error rate went to zero.
Adding one thing — put the date on the label too. Concentration plus date and you can never mix two vials up.
comment on reading concentration threads from 2024 and half of it aged badly in c/reconstitution · 21 points · 2 years ago
Agreed on the swirl.
This is the sentence that makes the rest unnecessary. Write it on the vial and the problem is gone.