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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 does prune juice constipation treatment take? For most babies, it can take several hours after consuming the drink for them to produce a bowel movement. Some babies have had success within minutes. The time it takes to work varies greatly from baby to baby but should take no longer than 12 to 24 hours. If your baby is struggling to go, prune juice is a safe and effective way to get their bowels moving and eliminate discomfort.