Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
muscle pain or weakness;
numbness or tingly feeling in your fingers or toes;
pale or gray appearance of your lips, tongue, or hands;
severe or ongoing vomiting or diarrhea;
fever, chills, body aches, flu symptoms; or
easy bruising, unusual bleeding, feeling weak or tired.
Common side effects may include:
nausea, vomiting, stomach pain; or
diarrhea.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Colchicine side effects (more detail)
