What are known reactions to colchicine and/or allopurinol for gout?

See below: Diarrhea, neuropathy, leukepenia, pancytopenia, nausea, cramping, fatigue, headache, etc.

Side effects.: Colchicine can cause diarrhea and Allopurinol if not started properly can trigger a gout attack. There is a rare allergic reaction to Allopurinol where one can have fevers, elevated liver enzymes, and rash.

Colchicine: Most common side effect is stomach upset and diaherra.