Newwings is right about the effects, the brain also tries to produce its own chemicals to counter the effects, but there is only so much it can fight against. I used alcohol to 'medicate' many things such as anxiety and depression, but overall I think it increased both of those symptoms for me. Depression in the early stages of recovery is common as the brain chemicals try to normalize and that can be linked to reduced energy. Marked symptoms should perhaps be addressed by a doctor.
Like others here, I have to say that after some deliberation over the issue, the only real solution for me was abstinence, anything else seemed to lead to more of the same roller coaster.