Psyllium is a fiber supplement that acts as a bulk-forming fiber laxative used to relieve both constipation and diarrhea. Psyllium husk comes from a plant and is processed into a powder that can be found in granular or gel tablet form. Taking psyllium as recommended is considered safe; however, the misuse or overdose of psyllium may lead to health complications.
Vomiting and Diarrhea
Psyllium husk powder swells to form a gel when it meets liquid. Taking an overdose of psyllium powder may result in severe nausea and vomiting as it swells inside your digestive tract. Diarrhea may also occur from psyllium's laxative effect, according to Drugs.com.
Abdominal Pain
Too much psyllium may cause abdominal cramping and discomfort. In some cases, intestinal blockage may occur if psyllium swells inside the intestine, blocking off the passage of waste, warns MedlinePlus. Symptoms of intestinal obstruction include abdominal pain and cramping that may come and go and the inability to pass gas or stool. Intestinal obstruction is considered a medical emergency. Seek medical attention if you have abdominal pain and trouble passing stool after taking psyllium or if you believe you've taken too much.
Dehydration
An overdose of psyllium may cause severe diarrhea. Fluids and electrolytes are lost during prolonged episodes of diarrhea, which may lead to dehydration. Taking in fluids is important to prevent dehydration during episodes of diarrhea. If you are unable to take fluids by mouth due to nausea, vomiting or abdominal discomfort, medically administered fluids may be needed to prevent dehydration.
Choking
Psyllium must be taken with an adequate amount of fluid to prevent it from swelling inside your throat or esophagus, advises Drugs.com. Using too much psyllium husk powder at once may cause an airway obstruction. If using a powdered version of psyllium, mix the recommended amount of powder and water before drinking. If taking psyllium powder in a capsule form, ensure that you only take the recommended amount of pills and swallow each pill with copious amounts of water to prevent choking.
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