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Psyllium comes in many forms—as a powder, granules, capsule, liquid, and wafer, all of which are taken by mouth. It's usually taken one to three times daily. Psyllium must be taken in the recommended amount and mixed with an adequate amount of water or other liquid (at least eight ounces or 240 milliliters) or it may lead to constipation and possibly even cause a small bowel obstruction. Starting slowly with a small dose—specifically, no more than a five-gram increase a day each week—is recommended to give the digestive system time to adjust to the increased fiber.
The Institute of Medicine recommends a fiber intake of about 25 grams a day for women and 38 grams a day for men (adults ages 21 to 50). Older adults tend to consume fewer calories, so the recommendation for women and men over 50 is 21 grams and 30 grams a day, respectively.
If using as a laxative, psyllium should only be used for one week. Psyllium can be used for longer periods of time as a fiber supplement, but only with your doctor's permission.
The absorption of many drugs can be affected by psyllium, so talk to your doctor before using psyllium if you're taking any medicine. Don't take psyllium at the same time you take your medicines. Psyllium should be taken at least two hours before taking your medicines or two to four hours afterward. *
