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Antidotum Thallii-Heyl Side Effects

Generic Name: prussian blue

Note: This page contains information about the side effects of prussian blue. Some of the dosage forms included on this document may not apply to the brand name Antidotum Thallii-Heyl.

For the Consumer

Applies to prussian blue: oral capsule

In addition to its needed effects, some unwanted effects may be caused by prussian blue (the active ingredient contained in Antidotum Thallii-Heyl). In the event that any of these side effects do occur, they may require medical attention.

Major Side Effects

You should check with your doctor immediately if any of these side effects occur when taking prussian blue:

More common:
  • Convulsions
  • decreased urine
  • difficulty having a bowel movement (stool)
  • dry mouth
  • increased thirst
  • irregular heartbeat
  • loss of appetite
  • mood changes
  • muscle pain or cramps
  • nausea or vomiting
  • numbness or tingling in the hands, feet, or lips
  • shortness of breath
  • unusual tiredness or weakness

Minor Side Effects

Some of the side effects that can occur with prussian blue may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

Incidence not known:
  • Blue colored stools

For Healthcare Professionals

Applies to prussian blue: oral capsule


The most common adverse event was constipation.[Ref]


Very common (10% or more): Constipation (24%)
Frequency not reported: Gastrointestinal motility decreased, stools blue color, oral mucosa and dentition colored blue[Ref]


Common (1% to 10%): Hypokalemia[Ref]


1. "Product Information. Radiogardase (Prussian blue)." Heyl Chemisch Pharmaceuticals, Berlin, Germany, AL.

Not all side effects for Antidotum Thallii-Heyl may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

More about Antidotum Thallii-Heyl (prussian blue)

Consumer resources

Other brands: Radiogardase

Professional resources

Related treatment guides

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