My Son Is 2 1/2, I Took Him Today For

My son is 2 1/2, I took him today for pretty bad wheezing and coughing they gave him steroids, antibiotics and albuterol. This evening I gave him his doses, and just now I had misread the bottle of azithromicin and thought he had to take another dose so he has had 4ml at 6 pm and just now 4ml at 9:30 I thought it was 2 doses a day for the first day so I was giving him the second before he went to bed, but I misread.