What are the side effects of taking potassium iodide?

Although extremely rare and often unverified, the following side effects of potassium iodide are possible:

• Gastrointestinal
• Nausea, vomiting, diarrhea, stomach pain
• Allergy-Related
• Angioedema (generalized swelling)
• Arthralgia (joint pains)
• Eosinophilia (allergic blood white cells)
• Lymphadenopathy (Enlarged lymph nodes)
• Urticaria (itching)
• Skin Rashes