alcohol and colchicine

I have been taking colchicine for 5 years as a preventitive from gout attacks. I take 0.5 mgs. two times a day and I am concerned about the toxicity build up in my body.I was also wondering if I should be concerned for taking it for such a long time.I was also wondering if alcohol use was risky while taking this medication and if so what should I be concerned about.