Could someone in the know please tell me if miralax is the same as movicol which we get here in Australia? Movicol contains macrogol 13.125g, sodium chloride 350.7mg, sodium bicarbonate 178.5mg, and potassium chloride 46.6mg. Each sachet contains 13.8g so how much would I need to take and when would be the best time. It is very expensive. $23 for 20 sachets. Thanks so much.