Hello Amy, and welcome to Anxiety Zone...
To begin with answering your question, keep this in mind, that anxiety disorders and alcohol do not mix. Alcohol depresses the nervous system, so those with an anxiety disorder may find some temporary relief from their anxiety symptoms when then drink. The problem with this is when drinking becomes a form of self medicating. As time goes on, one will develop a tolerance to alcohol, requiring more of it to produce the same effects. Also, one might initially feel better after a few drinks, but once the alcohol wears-off, anxiety symptoms will not only return, but will often times be worse. There is also a correlation between those individuals with anxiety disorders, becoming chemically dependent (alcohol and/or drugs).
The literature on BuSpar recommends avoiding both alcohol and grapefruit juice. While BuSpar and alcohol are not considered a deadly combination like the benzodiazapines and alcohol are, alcohol can intensify the side effects of BuSpar, causing increased drowsiness and/or dizziness.
I hope that this helps to answer your question.
The very best to you, Amy!... Chuck