B 12 needle size

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Regular Member

Date Joined Sep 2005
Total Posts : 89
   Posted 11/4/2010 8:01 PM (GMT -7)   
When I started B 12 injections my pharmacist asked if I wanted the big needles or the little ones.  I thought he was joking, and he was a little, but he explained there were two sizes.  I, of course, chose the smaller [shorter].   When I went back for more from a different pharmacist I was given the bigger ones.   It's intimidating enough injecting onself with the smaller needle, but the second pharmacist explained that the longer one improves absorption.
I went back to the first pharmacist and he said if I had big muscles [I don't] the longer one might make a difference but in my case it wouldn't.
However, twice the doctor's office has called following a blood test [just shy of 400]and told me to do a "reload" which is to inject every week for a month and then resume monthly shots.
What size do you use?

Veteran Member

Date Joined Jul 2006
Total Posts : 6927
   Posted 11/4/2010 8:11 PM (GMT -7)   
In my experience, I do better with the little ones.
Forum Co-moderator - Crohn's Disease/Thyroid Disorders: All comments have the caveat contact your local health care provider.
I will find a way or make one. –Phillip Sidney 1554-1586
All that I am and all that I shall ever be, I owe to my Angel Mother.
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Forum Moderator

Date Joined Apr 2007
Total Posts : 32602
   Posted 11/4/2010 8:17 PM (GMT -7)   
25G 5/8 Latex Free.

Regular Member

Date Joined Feb 2004
Total Posts : 437
   Posted 11/5/2010 5:45 AM (GMT -7)   
I use the long ones because it has to get into the muscle. I stick in my arm to get it in there good. I've had trouble with the B12 shots not working well enough so I tried a different approach and it's working well now.

Equestrian Mom
Veteran Member

Date Joined Mar 2008
Total Posts : 3115
   Posted 11/5/2010 5:50 AM (GMT -7)   
I use the bigger ones now...don't know the number off hand, but my numbers have been better since I started using them.
Crohn’s dx 1989
some terrible years before my
temporary ileo in 2001
Proctocolectomy w/end ileo in 2008
...wish I knew then what I know NOW!

Veteran Member

Date Joined Jan 2007
Total Posts : 3200
   Posted 11/5/2010 8:21 AM (GMT -7)   
I use the the 3ml 5/8, it's a kinda small needle, but the syringe is bigger. I find it easier to draw up 1 ml into
a 3ml syringe than the smaller 1ml syringes. My count at my last blood work was 500, so the little needles
are working!!

Too many years with CD
Two bowel resections, several obstructions.
Fibromyalgia and recently diagnosed with chronic pancreatitis and lupus.
B12 Shots bi-weekly

Laughter is the brush that sweeps the cobwebs from our hearts...

Regular Member

Date Joined Oct 2010
Total Posts : 79
   Posted 11/5/2010 11:50 AM (GMT -7)   
I use the bigger needles too - 25 G.  Anything smaller/shorter than that doesn't get into my muscle (and I'm small with no muscles).
Diagnosed with CD in 1989 - age 11
Resection surgery in 1997
Currently on Remicade - 10mg/kg, every 8 weeks
Take 1000iu of Vit D daily and B12 shots monthly
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