Psyllium is considered safe, but it can occasionally cause side effects like bloating or gas, especially if it’s not taken with enough water. In very rare cases, it can cause an allergic reaction. If this happens to you, seek medical attention immediately.
If you have a sensitive digestive system, you should start with a small amount and speak to your doctor before use.
Psyllium can also affect any other medicine you’re taking, as it binds to them and lowers their effectiveness. It’s best to keep psyllium separate from any other medications, and let your doctor know you’re taking it.