A doctor suspected me having a claymdia, or gonnorreah, or urine track infection, because a syphilis test came back negative so he prescribed me acido nalidixico. The prescription was a total of 20 pills 3 times a day (500mg pills) . I started having nightmares so I quit taking the antibiotic. I took all medicine but 1 pill. Will I be ok as far as infection is concerned? My infection has cleared up very well and no more discharge is seen. Is this medicine effective against claymdia,gonnoreah?