In the inter-group analysis , in the study product group compared with the placebo group , a significant difference ( t4 study treatment vs. t4 placebo , p = 0.03 ) was observed at t4 in night-time cough score.Considering the intra-group analysis , only the study product group registered a significant improvement from t0 to t4 in both day-time ( t0 vs. t4 , p = 0.04 ) and night-time ( t0 vs. t4 , p = 0.003 ) cough scores.A significant difference , considering the study product , was also found in the following intra-group analyses : day-time scores at t4 vs. t8 ( p = 0.01 ) and at t0 vs. t8 ( p = 0.001 ) ; night-time scores at t4 vs. t8 ( p = 0.05 ) , and at t0 vs. t8 ( p = 0.005 ) .