Article in English: Fiber helps absorb fluid in your intestines and make your stool bulkier, which in turn helps the bowels contract and push the stool out. It is important, however, that you try to incorporate more fiber into your diet before trying a supplement as this is truly the best way to get more fiber. Most bulk-forming agents can be taken in capsule or powder form and mixed with 8 oz of water or fruit juice. Follow any directions on the label and only take the recommended dosage. Potential side effects include increased flatulence, cramping, and bloating. Most people see results within 12 hours to 3 days Common bulk-forming laxatives include:   Psyllium  - Psyllium is a soluble fiber used to increase bulk and stimulate the bowels to contract and release stool with ease. A significant amount of research has suggested that psyllium can relieve constipation. You can find psyllium in the widely available product Metamucil. You must drink at least 8 oz of liquid when you take psyllium.   Polycarbophil - Polycarbophil calcium has been shown in several studies to help treat chronic constipation. With the main ingredient being mineral oil, lubricants work by coating the surface of stool, which helps the stool keep fluid and pass more easily. Most people see results within hours of consumption. Popular brand names available in most pharmacies include Fleet and Zymenol. Lubricants are simple and inexpensive laxatives, but should only be used as a short-term prescription. The mineral oil in lubricants can decrease the effectiveness of certain prescription drugs and can also inhibit the absorption of fat-soluble vitamin and minerals in your body.  Lubricant laxatives are generally taken at bedtime and may be taken orally on an empty stomach and in an upright position. Be sure to drink at least 8 oz of water or juice after you take this laxative.  Physicians do not recommend mineral oil for persistent treatment of constipation. Better known as stool softeners, emollient laxatives, such as Colace and Docusate, work to increase the...

Summary in Vietnamese:
Sử dụng tác nhân hình thành chất xơ. Dùng thuốc nhuận tràng bôi trơn. Dùng thuốc nhuận tràng làm mềm. Dùng thuốc nhuận tràng thẩm thấu. Dùng thuốc nhuận tràng kích thích. Dùng thuốc nhuận tràng tự nhiên hoặc thảo dược. Lưu ý rằng các phương pháp điều trị không theo toa chỉ nên được áp dụng tạm thời.