Taken azithromycin 3 days-500mg, 1gm, 1gm respectively for chlamydia I want to repeat the course, due to alcohol after how much time can I repeat?

Ask prescriber. Ask the person who prescribed the medication. But sometimes the course is repeated in a week or more commonly after a couple of weeks. In most cases the 500 mg - 1 g - 1 g treatment would be effective and no further treatment necessary.