My husband, age 79, had a quadruple bypass 3 weeks ago. Has been on Plavix since operation. Four days ago his scrotum swelled, there were blood blisters on both sides. I called dermatologist. He prescribed Vytone. I've been applying it 2X/day. Blisters are drying, swelling is down, inflammation less, pain is decreasing. But - can this happen again? Can this be a reaction to Plavix?