I started taking Phentermine 37.5 today. Instead of the agitated racing heart I was prepared for, I find myself tired, freezing & with a heartrate of 48bpm's. Has anyone heard of this medication slowing down yur heart rate?

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I think this is a very unusual reaction to phentermine and would either call my Dr. or at least ask a pharmacist if this could be a side effect. I wonder if you should discontinue taking this drug until you have spoken to your Dr. If your heart rate is already at 48, more of the drug might cause a more serious drop and be dangerous. I hope you will talk to someone. Please let us know how your are doing.

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My advice is to stay away from It! I took it for long periods several time throughout my life and now I have pulmonary hypertension and other heart issues. While it will help you lose the weight TEMPORARILY the lasting effects will be with you for the rest of you life and I am living proof. Please don't take my word for it. Do the research and find out from others who are suffering from the remnants of what sounds like a good idea at that time in our lives. Best wishes to you.

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