Killswitch97
GLP-1 Novice 🚫No Source Discussion🚫

Thoughts on filling my syringes of tesa and having them ready for the week? Anyone do this


This is a huge nope, for me. Syringes are not meant to hold things long term. If you choose to do this, it ups your chances of at the very least, ISRs and at the worst infections like cellulitis.Killswitch97 said:Thoughts on filling my syringes of tesa and having them ready for the week? Anyone do this

Just to make night time routine a little faster. Wasn’t sure if the rubber would break down in the syringe. Figured it wouldn’t work was just curiousBNLFL said:Why? Doesn't matter to me, just curious. How many times a week are you pinning?

What is the mechanism by which one sterile delivery method can become unsterile by “time”, CandyCap? Can you explain your “huge openness” to me like I’m 5?CandyCap said:This is a huge nope, for me. Syringes are not meant to hold things long term. If you choose to do this, it ups your chances of at the very least, ISRs and at the worst infections like cellulitis.
BNLFL said:Why? Doesn't matter to me, just curious. How many times a week are you pinning?

Figured as much. Wasn’t sure if the syringe would break down and cause issues. Thanks for the inputCandyCap said:This is a huge nope, for me. Syringes are not meant to hold things long term. If you choose to do this, it ups your chances of at the very least, ISRs and at the worst infections like cellulitis.

If you’re loading for a short duration I’ve seen zero evidence of that being a poor practice as of yet. If one can load a pen vial with similar rubber stoppers, etc then degradation of that is not any issue.Killswitch97 said:Just to make night time routine a little faster. Wasn’t sure if the rubber would break down in the syringe. Figured it wouldn’t work was just curious
LabRatts said:If you’re loading for a short duration I’ve seen zero evidence of that being a poor practice as of yet. If one can load a pen vial with similar rubber stoppers, etc then degradation of that is not any issue.
The notion that prefilled syringes may be dangerous might be shocking news to the likes of Eli Lilly and others who package some of their drugs in PRE-Filled syringes.…![]()



Rubber stoppers and plastics abound, what's the exact difference between the formulation of the 30 day use monthly pens from the big pharma folks versus the plastic in an insulin syringe, Grogu?Grogu said:Just out of curiosity, what Eli Lilly product is supplied in a pre-filled insulin syringes? I’ve had Zepbound pens, and that’s definitely not a pre-filled insulin syringe and the delivery mechanism is totally different.
RubbaDubba1 said:I've done 2-3 weeks worth of pre-filled syringes and haven't had a problem. I saw on here, someone mentioned to store the needle end upright. I keep them in a labeled Ziploc bag, upright in a coffee cup. I think they're a nurse and they did it themselves.


Even some peptide celebs, will do a couple weeks worth.Grogu said:In the compound tirzepatide subreddit, there are tons of accounts of folks getting their medication supplied to them from their med-spa or doctor's office via insulin syringes. And all have survived, we think. So, although something I personally wouldn't do, it's probably not gonna kill you.
Medivant, a 503b outsourcing facillity, actually has pre-filled syringes, but we're talking apples to oranges as their pre-filled syringes are pretty slick (glass).
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LabRatts said:Rubber stoppers and plastics abound, what's the exact difference between the formulation of the 30 day use monthly pens from the big pharma folks versus the plastic in an insulin syringe, Grogu?
RubbaDubba1 said:Even some peptide celebs, will do a couple weeks worth.

Touche' on the planetary existence thing. Perhaps in a galaxy far far away the plastics are of a differing nature. FWIW, I've had re-usable pens that seemed more poorly made than some insulin one time use syringes... We're all never more than a lil rubber stopper away from a sheer calamity though, agreed? Hang in there, and thanks for the response-Grogu said:I have no horse in the race, but first, the mechanism that holds the medication, at least for a Zepbound pen, is a glass vial with a pretty substantial plunger. That's definitely different than a cheap .15cent insulin syringe. The syringe and needle is substantial. The green thing is the mechanism that pushes the plunger when the spring is activated. The syringe below is in a used state.
I've never had a multi-use pen, but I'd imagine we're talking about glass and different types of plastics than an insulin syringe, but what do I know, I'm not even from this planet
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Prefilling is a major hassle compared to pens. Pens make it easy and quick.Grogu said:Yeah, I'm sure. I definitely don't think it will kill you. To me, it's not a big deal to draw and then inject, but I'm only doing two injections a week. If I was doing more, I'd definitely look into pens first, before prefilling syringes. That's just me. Everyone has different risk tolerances.
AlexSilver said:Prefilling is a major hassle compared to pens. Pens make it easy and quick.