My Gastro DR recommended a double dose about 12 hours apart because he diagnosed my BM problems as Constipation. My BM's have never been hard but difficult and more soft than hard. I followed his advise for 2 days--- 2 capfills a day--- and on the second day, I developed increasingly severe diarrea and painful gas. I assume the cause of my present gastro discomfort is an intestinal reaction to the increased Miralax. I want to follow Dr'd orders but if this gastro problem is a result I must not continue. Can a double dose over a 2 day period be the cause my current gastro problem? If so, how long will it remain in my digestive tract before the diarrea will end?