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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.
How long are dried fruits safe? Fruits such as dried apricots, prunes and raisins will keep at top quality in the pantry for six months. After opening, you may wish to store them tightly sealed in the refrigerator to preserve the quality for up to six additional months or freeze them for one month.