I m taking Diltiazem for high blood pressure. A few years ago I developed a rash on my hands that has been repeatedly diagnosed as contact dermatitis by several Dermatologists....but even after patch testing no one is able to tell me what I m coming into contact with that is causing the issue. I ve read that 2% of people who take diltiazem develop rashes. I feel like the problem on my hand is internal because it is cleared up almost immediately by a Kenalog shot. If a shot clears up the problem with my hands doesn t that mean it s happening inside? Problem is, when the shot wears off my hands become worse. It s been several years, would love any help or advice. Thx XXXX