I'm on my third day of taking methylprednisolone for poison ivy. On the second day, I started to have abnormal vaginal bleeding that looked like the beginning of my period. I've looked at sites online but there is no trend showing that abnormal bleeding was a symptom. I've seen random sites that say it's possible, but nothing to make me feel like this medication could be the cause. I'm wondering if anyone has had the same experience. Any help is great!