Scintigraphy Study to Compare the Antireflux Activity of the Z0063 Versus Gaviscon Double Action Tablets, in Healthy Adult Subjects

The total study duration per subject is 37 days including a screening period up to 21 days, a wash-out period of 4-7 days and a follow-up of 4-7 days.

Inclusion criteria

• Male or female subjects, between 18 and 55 years of age, inclusive.
• Body weight between 50.0 and 100.0 kg, inclusive, if male, and between 40.0 and 90.0 kg, inclusive, if female, body mass index between 18.0 and 28.0 kg/m^2, inclusive.
• Certified as healthy by a comprehensive clinical assessment.
• Normal vital signs, electrocardiogram (ECG) and laboratory parameters.
• Subject has to be willing to eat the standard radiolabelled meal (eggs on toasts and orange juice).

Exclusion criteria

• Any history or presence of clinically relevant abnormalities at screening which could interfere with the objectives of the study or the safety of the subject's participation.
• Blood donation of more than 450 mL within 3 months before inclusion.
• History or presence of drug or alcohol abuse.
• Smoking more than 5 cigarettes or equivalent per day, unable to stop smoking during the study.
• If female, pregnancy (defined as positive beta-human chorionic gonadotropin [β-HCG] blood test), breast-feeding.
• Any medication (including St John's Wort) within 14 days before inclusion with the exception of hormonal contraception or menopausal hormone replacement therapy.
• Any subject in the exclusion period of a previous study: participation in a new chemical entity clinical study within the previous 3 months or a marketed drug clinical study within the previous 30 days.
• Any subject who cannot be contacted in case of emergency.
• Positive result on any of the following tests: hepatitis B surface (HBs Ag) antigen, anti-hepatitis C virus (anti-HCV) antibodies, anti-human immunodeficiency virus 1 and 2 antibodies (anti-HIV1 and anti HIV2 Ab).
• Positive result on urine drug screen.
• Positive alcohol test.
• Known hypersensitive to alginates, products or formulation excipients and/or to any component of the standardized meal.
• Any subject with difficulty in chewing and/or swallowing.
• Participation in a study in which radioisotopes were administered or in which subject was exposed to any radiation other than normal background radiation within the 12 months before the screening visit.
• Any intake of aluminum and magnesium containing antacids or other alginate-containing medicinal products within 14 days before inclusion.

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.