For 5 days post IV methylprednisolone (1g daily for 3days), I experienced bradycardia (39-44bpm), hypotension & chest pain. Any concern for next pulse?

Don't know. Don't know if repeat treatment should be concern or not but why are you taking steroids in the first place? If it is for allergic, inflammatory or autoimmune disease what we propose is to look for the cause. When no other cause is found in such disorders, one should look for environmental causes. Please visit us to learn how we propose to look for the causes.