Please let your obstetrician know about this change immediately. While it is possible that this is a side effect of many very benign conditions, it is impossible to know for sure without doing a physical exam including a vision test, asking you more questions, and possibly even doing some radiographic imaging. Changes in vision, because of the permanent nature that can be associated with them, as well as the fact that these changes can accompany other serious and potentially very complicated brain problems, are a symptom that needs to be addressed with a doctor
immediately. In your specific case, given your recent post-partum status, there are additional variables that need to be noted, including if the blurry vision started immediately after giving birth, or if the problem seems to have started only after you started the medication. Additionally, is the problem worse at certain times of day, or did it come on suddenly? Finally, is the blurriness getting worse? Because any change in vision could potentially be alarming, it is important to talk to your doctor quickly to determine what needs to be done in your particular case. Your obstetrician will likely be a great place to start given your recent contact with him or her, as well as his or her knowledge about the many changes that accompany labor and delivery.