pracinostat + ciprofloxacin

**Pracinostat + ciprofloxacin** is a hypothetical combination of two small molecule drugs: pracinostat, an orally bioavailable histone deacetylase (HDAC) inhibitor developed for antineoplastic purposes, and ciprofloxacin, a fluoroquinolone antibiotic widely used to treat bacterial infections. - Pracinostat acts as a selective HDAC inhibitor (notably of HDAC1 and HDAC2), leading to increased acetylation of histone proteins and promoting antitumor activity through modulation of gene expression[3]. - Ciprofloxacin inhibits bacterial DNA gyrase and topoisomerase IV, disrupting DNA replication and cell division in bacteria[5]. There is no evidence of an approved combination product or fixed-dose combination of these two drugs; use together would be off-label and may raise drug interaction or safety considerations.