Azithromycin is a long-acting macrolide antibiotic that works by interfering with the protein synthesis of the bacteria. Zithromax is the generic version of Azithromycin. Azithromycin reaches peak effect in a little over two could notice a slight relief in symptoms directly corresponding to this 2 hour time frame. Relief of symptoms then tapers off slowly over the next couple of days. This is also in keeping with the remarkably long half-life of 62 hours for the Azithromycin. Any slight side-effects also seemed to taper off at the same rate.
Pre-pregnancy, it is important to optimise control of your asthma. During pregnancy you should be closely monitored so that appropriate changes to treatment can be quickly implemented in response to any changed symptoms. In general, asthma inhalers are believed to be safe in pregnancy and the risk of harm to the foetus is much greater from having undertreated and poorly controlled asthma. Roughly one third of women find that their asthma improves during pregnancy, one third find that it stays the same, and the final third find that it worsens.