I found this helpful

[WIZARD6787]

I evaluated the information on injecting available regarding injecting insulin with regards to risk of self preloading syringes and multi use vials. I also evaluated information available for clinical environment injections.

I found this information and my evaluation more credible and helpful than my and others fear driven evaluation.

My conclusion is that multi use vials and self preloading syringes causes no established risk and conjecture about the risks to be unhelpful and not warranted. There is as with everything in life a risk including the risk of not supplementing at all.

It is a factor that in the USA ampules are no longer in use so I am used to the concept of multi use vials. I have never seen an ampule.

I do have to watch my complacency. I tend to cut corners over time.

I am aware that B12 in solution for injecting is light sensitive and that is an easy fix using tinfoil. I do not just trust the amber vial is sufficient.

I do follow the Center for Disease Controls recommendation for use in a clinical setting which is much more likely contaminated than my home. Their recommendation which likely has a robust safety factor is to discard any vessel that is opened/pierced after 28 days. I made an error in using a vial after a period of non-use and did have a bacterial infection at the injection site which resolved in three days with no treatment. That is a factor in my evaluation.

It is true the MUV Multi Use Vials may have a antibacterial agent as a preservative. I don't know about ampules. There is no reason for a filler in B12 for injection as there is for oral B12. A vial may be labeled SUV Single Use Vial or MUV.

I do not equate the risk of my injecting to injecting done by illegal drug users who share needles, water and reuse needles.

I also never use the word safe and certainly never perfectly safe. My risk evaluation is always a risk benefit evaluation. Living that both are unknown.

In the USA multi use vials and injecting at home is becoming accepted for weight loss by prescription.

When I started self injecting I had not yet discovered this forum. I was going with what I had read. As I wrote I remembered the angst of knowing that if I needed treatment for an infection I would be in the undesirable situation of having to seek help from medicial personal and state I was self injecting. I do not lie as it is not good for me.

When I read declarations on this forum about risks or guaranteed results it annoys me. Actually any advice rather than sharing annoys me. I say to myself and yet you self treat which is a risk with unknown results.

[Hockey_player]

I have 10 dose vials. I sometimes am on a schedule where I get an injection every week or two. I did not read the instructions until recently and have been just using the same vial with no adverse effects. How important is it to get a new vial after 28 days? It seems like a waste but it costs so little that maybe I should do that. I pay about $6 Canadian for 10 doses (3.5GBP).

[WIZARD6787 in reply to Hockey_player]

>>How important is it to get a new vial after 28 days?

I have not evaluated the risks or the probability of harm as I have never injected less than 1 mg/ml per day with a 30 ml vial.

So I have no information.

I personally evaluate the risk and make a clear decision which changes only with new information including what I experience. I personally find it unhelpful to evaluate each time I inject other than the effects.