Before having Zithromax, it is of utmost significance that you have discussed with your health provider any diseases or ailments suffered by you in advance. People suffering from diseases such as a heart rhythm disorder, liver disease, kidney disease, or having a long history of QT syndrome must need to have a word with their health caretaker before starting to use Zithromax. For expectant women or for those planning a baby during the process of treatment through Zithromax should tell their doctor about their present or prospective pregnancy before beginning the treatment using Zithromax.