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Quick Answer. Prune juice takes different amounts of time to relieve constipation depending on the severity of the problem. Prune juice starts working within an hour and can take an hour, six hours, a week or several weeks for a lazy bowel, according to Total Health. Continue Reading.
Prunes. Prunes and prune juice are an old standby to solve constipation problems. They were so strongly recognized as a remedy for constipation that several years ago plum growers worried that people would eat them only for medicinal purposes.. The âpower puddingâ you wrote about worked for my husbandâs constipation in two hours! Then he found out that prune juice in the morning and dried prunes at bedtime, along with eating less dairy, did the job. A. Power Pudding is an old trick nurses use to help their patients overcome a sluggish digestive tract.