I have given nat sulph 6x to my mother. My mother felt fine for some days but after some days new symptoms produced. Like acidic face and general weakness. Then I gave her arsenic alb 30c. Again she felt fine. But after some days my mother is experiencing a little weakness. Kindly tell me whether I should leave it as it is? Or should give antidote of natrum sulphuricum 6x and ars alb. And what is the antidote of natrum sulphuricum 6x and ars alb? Actually I gave nat sleep to my mother for damp weather sickness i.e food poisoning, vomiting.