Recently I have been getting a lot of white shark/dolphin pills which have been really really good. The thing is a few times on these pills I have felt pretty sick whilst coming up at the start of the night and actually was sick at the weekend after double dropping. Some of my friends have experienced the same problem with these pills. Even though after coming up I don't feel ill after dropping more pills or even double dropping several times in the night. I have never had this with any other pills so what could it be that is causing it?