Adacel Tdap

List of products in the National Drug Code with proprietary name adacel tdap. This vaccine is used to keep up protection (immunity) against diphtheria, tetanus (lockjaw) and pertussis (whooping cough) in children and adults who have been vaccinated for these diseases in the past. Vaccination is the best way to protect against these life-threatening diseases. Vaccines work by causing the body to produce its own protection (antibodies). Booster doses are needed to keep up immunity because antibody levels may become too low over time to provide the needed protection.