 [ Symptoms ] since these two drugs are from the same family can azithromycin oral be used with erythromycin ophthalmic [ Disease ] yes you can it is not the norm but for some like myself it may happen i actually had a light period 4 5 months into all of my pregnancies which was attributed to having low level of hcg all pregnancies were normal and the infants were fine but i did have bleeding while pregnant