How long does azithromycin stay in your body after last dose ?

136hrs: The half-life of Azithromycin is 68hrs when multiple doses are consumed. So that would mean it takes 136hrs for your body to eliminate it from the body.

Half life: Following a single 500 mg dose, the half-life of Azithromycin is 11–14 h. The longer half-life of 68 h is achieved only when multiple doses are consumed. A half-life is the time for 50% of the drug to be excreted. This drug will stay in tissues much longer than in the blood stream.