For gout attack could i take : diclofenac 50mg , colchicine & allopurinol 100mg , all together ?

No!!: Allopurinol actually makes a gout attack worse when it's acute therefore you must stop taking that immediately. In combination the Colchicine and diclofenac when they are both anti-inflammatories which will decrease renal function and should not be taken together! please go to your pcp.

Gout: Colchicine- for gout pain allopurinol- for systemic condition, over production of the uric acid crystals that attack the joint(s) diclofenac- for inflammation, pain and fever. There are no drug interactions noted, however, there is a "black box warning" for the use of diclofenac may cause cardiovascular risks. These include blod clots, heart attack and stroke among others. Ask your md or dpm.

Allopurinol Chronic: For acute gout Colchicine and diclofenac are reasonable. Do not exceed the recommended dose of Colchicine and stop immediately if diarrhea occurs. Allopurinol is to prevent chronic gout. Many patients starting Allopurinol will have an acute gout attack because attacks occur when uric acid levels go up or down. To prevent this some patients take Colchicine daily for up to 6 months.