At a dermatologist, I was treated for seborrheic dermatitis with shots of Kenalog. I received 4 shots, the last two were 40 mg each - 2 weeks apart. I started experiencing skipped heart beats that have become very annoying. Sometimes my heart skips 7 beats per minute. I have no other side effects at the moment. Before receiving the first shot I asked about any side effects. The nurse told me I could have trouble sleeping the first night and may feel excited. NOTHING about heart arrhythmias. I went to my family doctor who took an EKG that showed PVC and I wore a holter monitor for 24 hours. I also called the dermatologist and explained the situation. The nurse confirmed that yes arrhythmias are a side effect of this shot.