I have a(NeET WT. 26.9 OUNCES) or 45 once a day dose Miralax powder and it expired July 2017. Is it still safe to take it or do i need to throw it away?? Its the powder form and its a full huge bottle and I sure hate to have to throw it away knowing how expensive it was and how much is left. Also what about expiration date concerning any other vitamin/supplement pills and/or powders?? Is there a chart or article or something on that line that can tell me about how long after the expiration dates they are safe and/or ok to take?? ANY INFO IS GREATLY APPRECIATED!