A Phase I/II Study to Evaluate the Safety and Efficacy of PerioSept® as Adjunct to SRP in Subjects With Periodontitis

Inclusion Criteria: * 18 to 74 years of age, inclusive * Diagnosed with moderate to severe generalized periodontitis (ADA Classification Case Type III or IV) * Must have at least 4 qualifying Study Pockets (PPD ≥ 5mm and BOP) in at least 2 quadrants (main trial) * Subjects must sign informed consent document(s) prior to initiation of any study-specific procedures and treatments * Agree to utilize study-provided tooth paste and tooth brush and agree to follow their standard oral hygiene routine with limitations noted below from the Day 1 visit through the end of the study * Sexually active subjects (both men and women) who agree to use acceptable contraceptive methods for the duration of the study * Able and willing to adhere to the study visit schedule and other protocol requirements Exclusion Criteria: * History of and/or known risk of life-threatening anaphylactic reactions to taurolidine, any of the components in the PS drug product, and other drugs or agonists (e.g., penicillin, nuts, insect stings) * Presence of an acute periodontal abscess * Known endodontic disease * Diabetes uncontrolled by medication defined as fasting blood glucose documented at ≥200 mg/dL within 90 days of Day 1 * History of illegal drug or alcohol abuse within the past 12 months and/or testing positive for illegal drugs (including marijuana) at the Screening Visit * Pregnant or nursing female subjects; women of child-bearing potential must have a negative serum or urine pregnancy test within 30 days and within 24 h prior to all treatment/dosing days * Use of systemic antibiotics and topically applied oral antibiotics and other antimicrobial agents (e.g., chlorhexidine) during the trial and within 30 days of Day 1. * An existing condition that may warrant use of antibiotics during the trial (e.g., white blood cell count indicative of ongoing infection noted at Screening Visit, subject with cystic fibrosis or chronic obstructive pulmonary disorder with history of frequent, recurrent lung infections) * History of and/or testing positive for Hepatitis B or C, Human Immunodeficiency Virus or other immunedeficiency syndrome or positive test for such at Screening Visit * Use of chewing gum of any kind and dental flossing for one week after all study treatments and use of any other oral dentifrices or oral health agents/treatments other than those provided herein for the study duration * Use within 30 days prior to Day 1, during trial or a condition for which use is anticipated during trial: topical oral, nasal and systemic corticosteroids, chronic (2 continuous weeks) non-steroidal anti-inflammatory drugs (NSAIDs) * Use of the agents known to affect periodontal status during the trial and/or use within 30 days prior to Day 1: immunesuppressants, calcium antagonist, phenytoin or anticoagulants * Heavy smokers/tobacco users are excluded: defined as those smoking ≥ 10 cigarettes or ≥ 4 cigars or ≥ 4 pipes per day * For non-heavy smokers, smoking ≥ 10 cigarettes or ≥ 4 cigars or ≥ 4 pipes per day is prohibited for the duration of the trial * Use of electronic/smokeless and herbal cigarettes/pipes and oral smokeless/chewing tobacco within 30 days of Day 1 excluded and all use of these products is prohibited during trial * Clinically significant (e.g., QTc interval \>450 milliseconds) abnormal electrocardiogram (ECG) noted at Screening Visit * Participation in another clinical study with an investigational agent within 90 days prior to Day 1 * Subjects who received oral health treatments/interventions within 90 days of Day 1, which the investigator believes may interfere with the periodontal parameters to be assessed in this study (e.g., significant dental and/or gum/oral tissue work). * Subject has a medical and/or dental condition and/or uses medications/supplements which the investigator believes makes him/her unsuitable for participation in the study