it is never a good idea to drink alcohol right before a dental appointment. alcohol affects your blood clotting system and depresses the central nervous system. not to mention how it can affect your in-office behavior. if you have anxiety it is much better to tell the dentist beforehand and so you can discuss your options.
i'm going to the dentist for a root canal and i've had a few glasses of wine. will this be a problem with the novocaine?