• Take psyllium with adequate water to avoid causing constipation.Dougal Waters/Digital Vision/Getty Images
  
  Psyllium husk is the covering of the seeds found on the plantago psyllium plant. It's an excellent source of dietary fiber, offering 71 g fiber in one-third of a cup. The same amount of oat bran, on the other hand, has only 5 g of fiber. Because of its high fiber content, psyllium is often used to improve digestion, lower cholesterol and alleviate constipation. There are, however, risks with taking psyllium husk.
  
  

Bloating

• Taking psyllium can cause gas or bloating because the fiber does not break down until it reaches the large intestine. You should begin taking psyllium in small doses and slowly work up to the full dose recommended by your product.
  
  

Slow Digestion

• Make sure you take your vitamins at least 2 hours after taking psyllium.woman with pill image by Adam Borkowski from Fotolia.com
  
  Psyllium slows digestion that can delay your body's absorption of medications or vitamins. You should take your psyllium at least two to 4 hours before your medication or other supplements. Taking too much psyllium could also reduce your body's ability to absorb certain minerals.
  
  

Constipation

• When taken with water, psyllium alleviates constipation but if you do not take at least six glasses of water throughout the day, the psyllium swells and causes constipation.
  
  

Choking

• You should take the psyllium husk with at least 8 oz. of water. Swallowing psyllium with insufficient water could cause the fiber to swell in your throat and cause choking. You should also avoid taking psyllium if you have trouble swallowing.
  
  

Allergic Reaction

• In rare cases, taking soluble fiber for long periods of time can cause an allergic reaction including rashes, itching or even anaphylaxis, which can lead to death. If you believe you are having an allergic reaction, seek medical care immediately.