Question: what is the difference between osmotic laxative and stimulant laxative?
Answer: Osmotic laxatives, including magnesium citrate and magnesium hydroxide, may produce a bowel movement in 30 minutes to 6 hours. Others may not take effect for 24 to 48 hours. Stimulant laxatives, such as Dulcolax and Senna, may take 6 to 12 hours.