Cepacol does not affect my sleepwalking

As part of my investigation of what factor impacts my sleepwalking, I looked at the effect of Cepacol. Cepacol is an over the counter throat pain killer which I don't expect to impact my sleepwalking. But I want to verify that hypothesis so as to be able to include those nights into the "no drugs" category.

Cepacol has no effect on my sleepwalking, as shown on the graphs below.

Average values, +/- SEM. % variation and statistical significance are indicated (if less than 1%)

Data exclude nights with clonazepam and are normalized for the effect of coffee and tiredness.