Profile: Orapharma Inc offers pharmaceutical products for oral health. Arestin® is an antibiotic treatment that comes in powder form. It contains microspheres that are filled with antibiotic minocycline and release the drug into the infected periodontal pocket, which kills the bacteria. It reduces pocket depths, kills the bacteria associated with periodontal disease and decreases bleeding on probing. These microspheres continue to fight the infection for up to 21 days after scaling & root planning.