Clinical trial NCT00495391 (phase 2, status: completed)
Conditions: chronic hepatitis c
ICD codes: B18.2, B18.0, B18.1, B18.8, B18.9, K71.3, K71.4
Drugs: nitazoxanide, placebo, ribavirin
SMILES: CC(=O)OC1=CC=CC=C1C(=O)NC1=NC=C(S1)[N+]([O-])=O, CN1C(=O)C=C(N2CCC[C@@H](N)C2)N(CC2=C(C=CC=C2)C#N)C1=O, NC(=O)C1=NN(C=N1)[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O
Eligibility criteria:

        Inclusion Criteria:

          -  Chronic hepatitis C genotype 1.

          -  Failed to respond to ≥12 weeks of peginterferon and ribavirin (<2 log10 drop in
             Hepatitis C Virus Ribonucleic Acid (HCV RNA) at week 12 or detectable Hepatitis C
             Virus Ribonucleic Acid (HCV RNA) at week 24).

        Exclusion Criteria:

          -  Females of child-bearing age who are either pregnant, breast-feeding or not using
             birth control and are sexually active.

          -  Males whose female partners are either pregnant or of child-bearing potential or not
             using birth control and are sexually active.

          -  Other causes of liver disease including autoimmune hepatitis.

          -  Transplant recipients receiving immune suppression therapy.

          -  Screening tests positive for Anti-Hepatitis A Virus Immunoglobulin M Antibody
             (anti-HAV IgM Ab), Hepatitis B's antigen (HBsAg), Anti-Hepatitis B core antigen
             Immunoglobulin M Antibody (anti-HBc IgM Ab) or Anti-Human Immunodeficiency Virus
             Antibody (anti-HIV Ab).

          -  Decompensated cirrhosis, history of variceal bleeding, ascites, hepatic
             encephalopathy, Child-Turcotte-Pugh (CTP) score >6 or Model for End-stage Liver
             Disease (MELD) score >8.

          -  Alcohol consumption of >40 grams per day or an alcohol use pattern that will interfere
             with the study.

          -  Absolute neutrophil count <1500 cells/mm3; platelet count <135,000 cells/mm3;
             hemoglobin <12 g/dL for women and <13 g/dL for men; or serum creatinine concentration
             ≥1.5 times Upper Limit of Normal (ULN).

          -  Hypothyroidism or hyperthyroidism not effectively treated with medication.

          -  Hemoglobin A1C (HgbA1c) >7.5 or history of diabetes mellitus.

          -  Body Mass Index (BMI) >28.

          -  History or other clinical evidence of significant or unstable cardiac disease.

          -  History or other clinical evidence of chronic pulmonary disease associated with
             functional impairment.

          -  Serious or severe bacterial infection(s).

          -  Ulcerative or hemorrhagic/ischemic colitis.

          -  Pancreatitis.

          -  History of severe or uncontrolled psychiatric disease, including severe depression,
             history of suicidal ideation, suicidal attempts or psychosis requiring medication
             and/or hospitalization.

          -  History of uncontrolled severe seizure disorder.

          -  Requires concomitant theophylline or methadone.

          -  History of immunologically mediated disease requiring more than intermittent
             anti-inflammatory medications for management or that requires frequent or prolonged
             use of corticosteroids.

          -  History or other evidence of severe retinopathy or clinically relevant
             ophthalmological disorder due to diabetes mellitus or hypertension.

          -  Hemoglobinopathies.

          -  History of hypersensitivity or intolerance to nitazoxanide or any of the excipients
             comprising the nitazoxanide tablets, peginterferon alfa-2a injectable solution or
             ribavirin tablets.