Dear Kitteagirl, thank you so very much for the info about your experiences with vitamin B12.  Today I asked a vitamin-D-deficient friend to look into vitamin B12 in case it was possibly another piece of the puzzle in terms of her exhaustion problems.  She was hesitant about it.  I have emailed her about your experiences and hope that this will get her to try it.  Thank you! 

I suffered from fibromyalgia for years...and the associated exhaustion. Then my doctor discovered that my Vitamin B12 levels were low. I've been on B-12 injections for the past month or so...and WOW!  What a difference in my life. I have so much energy and my pain is really gone, although I'm still on some fibro meds. Have your doctor check your B-12 levels. In the US, doctors consider you low if you're under 200, but Japan and some other countries consider you low if you're under 500. Now I'm giving myself the B-12 injections. Anything is worth a try when you have that horrible condition.

yes.. thanks for your post on my blog.  I am curious too to know if you are/have been vit d deficient.   thanks.

Hi, thanks for your post.  I saw your other post on Annon's blog, too.  Did you have the bladder problems that we are describing?  The kind that feel like a bladder infection but no infection is ever found?  Thank you for your advice about your experiences with guaifenesin. I am very, very hopeful that this guaifenesin is the final piece of the puzzle for me and others in my chronic pain class who have been dealing with vitamin D deficiency.  Did you also have low vitamin D?