Is it safe to use nicotine patches while taking blood pressure medicine?

Absolutely, smoking can cause high blood pressure, and the patch is the same chemical that is in a cigarette - nicotine. Of course, there are other reasons that you can have high blood pressure, and you cannot diagnose youself based on that alone. In addition, whether it is caused by the patch or not, drastic increases in blood pressure can be deadly. See your doctor and tell him/her all that is going on, including wearing the patch. Your doctor will be able to evaluate the situation.