Me and my girlfriend had Chlamydia. Doctor said us to take 1gr dose of Z-max once. My girlfriend started getting well after one week from taking that dose but then everything started back. But I am fine. We didn't have a sex after taking that medicine because we fear to reinfect each other. What if after taking 1gr Zithromax dose once it didn't help to my girlfriend and she still has the symptoms. Is it possible to take Zithromax second time? And if yes, after what period of time from taking the first dose she can take the second one? And does she need to increase the dose? Thank You