@h8fxr , I'm in the very same boat right-now, may I ask if you found an answer since ?
My 37.5mg venlafaxine XR have 3 of those mini tablets inside the capsule. (I bet those are 12.5mg).
But given @colleenyoung 's advice against taking those appart from the capsule, and the fact that i'm in canada as well (no instant release formula here), I'm left with no alternative than to go through the full dose (37.5mg) withdrawal symptoms until it subsidies.. I'm sweating, i'm dizzy, brain fog, and difficulty sleeping, but I guess it is safe to endure it all until it subsidies on it's own ?