Moxifloxacin exerts excellent antibacterial activity against a wide range of putative periodontal pathogens, including Porphyromonas gingivalis, Tannerella forsythia, Prevotella species, Fusobacterium nucleatum, Actinomyces species, Peptostreptococcus species, Campylobacter rectus, and Actinobacillus actinomycetemcomitans. Moxifloxacin penetrates well into soft tissues and is effective against intracellular periodontal pathogens when used in the treatment of periodontitis as an adjunct to scaling and root planning (SRP). Systemic administration of moxifloxacin has provided superior outcomes compared with SRP in conjunction with systemic administration of doxycycline, or SRP alone. We hypothesized similar benefits with local drug delivery of Moxifloxacin in the treatment of chronic periodontitis. To the best of our knowledge, there is no published literature on in situ gel using moxifloxacin employing gellan gum as the vehicle, for direct placement in the periodontal pocket for the treatment of chronic periodontitis.