Depending on the antibiotics, there may well be an interaction, if they are inhibitors of CYP3A, such as the macrolides clarithromycin and erythromycin (although these would be extremely odd choices post tooth extraction).
Cytochrome inhibitors such as erythromycin could increase avalability of Alprazolam
theoretically, but an abstract I found suggests that even though it inhibits CYP3A, erythromycin does NOT result in increased psychomotor side effects
of Alprazolam (and, I guess, by inference, may not increase cognitive effects)
A kinetic and dynamic study of oral alprazolam with and without erythromycin in humans: in vivo evidence for the involvement of CYP3A4 in alprazolam metabolism
Clinical Pharmacology and Experimental Therapeutics 1996 May;59(5):514-9
Yasui et al