You'll tear your side open, and it will not be worth an even pettier victory.

[It is a real problem. But there's actually a bigger question:] Is it actually blessed though, or is the stuff pre-transubstantiated?

[If it's just wine, then really there's no danger at all. Better to get that out of the way. And any discussion of the more vampiric part of Alucard's diet would only be met with a dead stare, because Belmont blood probably just takes like alcohol anyway. No nutritional value.]