I'd never heard of this before but there's a lot about boric acid on the internet and plenty of sources for boric acid capsules/suppositories. Just Google "boric acid suppositories".

it seems you can also make your own boric acid capsules.

http://www.probiotics-lovethatbug.co...-capsules.html

http://www.ehow.com/how_5084623_make...ositories.html

But there are some risks attached to its use:

http://www.ehow.com/facts_5349742_bo...e-effects.html

http://www.livestrong.com/article/13...suppositories/