Sir i have a problem in my stomuch 1.5year before DR recomend me LCYN 500MG antibiotic .... i feell ok after using this but after 9months before i again used it but this time i think it make infection but i dont know where but i feel uncomfortable in my left lungs down side i think it is stomuch i dont know ... i feel nausia also but i have chest problm from by childhood .. i also checkup again for DR . and gives me some test to do and their result is positive but i dont kow what happend