On Thursday morning I went to get a syrup to calm ...

On Thursday morning I went to get a syrup to calm my cough. The deal went very well, I explained to the person in charge what I wanted, the syrup has left me, I suppose the most expensive and worst of all there is. I have not been sleeping at night for 2 days or day. Before I had only a cough, now a non-stop cough I almost took half of the bottle and then affronted. So I do not know ??????