<s>[INST] hi, im 30 years old,female. i have problems with one of my valves,but not on medication,the docter said it is not that big of a problem. i have a pain in my left side for years and now that i am using duromine i get it more and then i dont feel so good my heart beets very fast. must i stop using duromine. [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Yes, you should definitely stop bromine tablets. Bromine is having determine. It is sympathomimetic Chat Doctor.  It stimulates heart and cause increase in heart rate (tachycardia). So your fast heart beats are due to bromine only. You already have valvular problem. And tachycardia can actually exaggerate and worsen the ongoing valvular problem. So better to consult cardiologist and get repeat ECG and 2d echo to rule worsening of valvular heart disease. And don't take bromine or any  </s>