Psyllium can sometimes cause:
Gas
Bloating
Abdominal discomfort
It can also be unsafe if taken without enough water because it may swell before reaching the stomach.
People with swallowing difficulties, intestinal narrowing, severe abdominal pain, or suspected bowel obstruction should not use psyllium without medical advice.
Psyllium Can Affect Medications
Because fiber can change how certain medicines are absorbed, it is often recommended to separate psyllium from prescription medications by a few hours.
If you take daily medication, ask a pharmacist how long you should wait between taking psyllium
