I know that the powder worked on someone only. I took the try since my friend's kid recovered after taking the treatment. And the powder is not medicine, it won't have side effects.
My son's appetite, poo poo and wee wee are ok. Nothing's bad. Maybe you can wait till this Saturday, then I can tell you whether my son needs to continue the treatment or not.
I don't know if there are still vancacies in the evening, but my friend said she waited for one hour when she visited the shop during weekends last time.