Prunelax is a natural and effective solution for constipation which helps to maintain bowel regularity. Prunelax is made out of Senna Extract which offers a natural, gentle, predictable and effective solution, in just 8 to 12 hours.Prunelax tablets contain twice as much active ingredient (15mg of Sennosides B) as standard laxative tablets (7.5mg of Sennosides B). This means you don't have to take as many pills.