User blog comment:LexFacie/Thoughts about Bankais./@comment-25065646-20140710180124/@comment-11051098-20140711161940

Urahara said they succeeded to deliver the Shin'eiyaku pills to all the captain-ranks inside and outside of Seireitei. From that I understand that every Shinigami who has a Bankai, got a pill, meaning the captains, non-captains like Renji and Ikkaku, and also the Royal Guard. It would be wise to include every Bankai user, just in case the Sternritters would attempt to steal Bankais again.