Threads like this are dangerous. At least 2 posters have posted advice that could be fatal and another poster has underestimated the safe dose by 75%, which is hardly going to help the OP's health anxiety.
Sooner or later, someone is going to follow wrong advice and take a fatal overdose, or fail to seek help after an accidental overdose. MN should delete these threads with a standard deletion message to contact NHS 111.