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What Causes A Low Resting Heart Rate When On Labetalol And Buspirone?

Posted on Mon, 29 Jun 2015

Question: I take labetalol 50 mg bid citalopram 5 mg alprazolam er 2 mg buspirone 5 mg bid and protonix 40 mg. I started 100mg doxycycline bid yesterday due to sinus infection since monday. my pulse is usually 65-75 at rest but yesterday was low to mid 50's. Why this sudden change and should I be concerned? 28 year old female with history of svt pvcs with ablation in 2006, panic disorder and post h. pylori treatment (protonix)

Answered by Dr. Dr. Muhammad Sareer Khalil (15 minutes later)

Brief Answer:
heart block and rhythm abnormalities should be ruled out

Detailed Answer:
Hello and Welcome

I appreciate your concern

You are taking Labetalol which has beta blocking action leading to a low heart rate. Bradycardia is present as heart rate is below 60. It can occur with possible heart block and therefore a baseline ECG should be done primarily. 24 hour Holter ECG monitoring can be advised to confirm or rule out any suspected rhythm abnormality. Thyroid function tests should also be done.

Wishing you best of health

Thanks

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Dr. M.S. Khalil

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Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar