Explanatory notesMany drugs included in the list are preceded by a square symbol(□) to indicate that theyrepresent an example of a therapeutic group and that various drugs could serve as alterna-tives. It is imperative that this is understood when drugs are selected at national level, since Explanatory notesMany drugs included in the list are preceded by a square symbol (□) to indicate that theyrepresent an example of a therapeutic group and that various drugs could serve as alterna-tives. It is imperative that this is understood when drugs are selected at national level, since