[Fast]

I've taken Ultram (50mg) twice a day for back pain for about 6 months now. I've never had any side effects or problems with it before. As of last night, about 30 minutes after taking my usual dose, I noticed I had an extremely rapid heartbeat, my face/neck were red and itchy. The rapid heartbeat persisted all through the night, and I only got about two hours of very rough sleep. As I said, I've never had any negative effects from this medication, and I don't understand why it would suddenly cause problems. Is this possible? I can't get ahold of my doctor and the pharmacist I spoke with wasn't helpful at all. What should I do?I've been taking penicillin for about a week now, due to a tooth extraction. My dentist said the two would mix just fine. I've never had any problems with penicillin in the past, either.

[AnimalFilter]

If you've taken it for that long without any side effects than it's doubtful that the Ultram has anything to do with it. Do you take any other medications?

[Flash R]

take BP supppressors.