Can Levothyroxine cause arrhythmia and hypotension?
Patient: I was diagnosed with hypothyroidism in April. My doctor prescribed me 125 mcg of Levothyroxine to start, and after 2 weeks reduced dosage to half. After 2 weeks on this dosage, my blood pressure dropped severely and I was syncope and admitted to the hospital. Dr. took me off Levothyroxine as he said I developed an arrhythmia, hypotension and sick sinus, and now has me on fludrocortisone to stabilize my heart rate.  My question is can the levothyroxine have caused my heart problems?  I never had any heart problems in the past and am very healthy & active. Doctor: DEAR USERTHANKS FOR CONSULTING AT HCMYES LEVOTHYROXINE CAN CAUSE ARRYTHMIA ONLY IF YOU HAVE TAKEN EXCESS DOSE OF THYROXINE MISTAKENLY.. BUT YOUR DOSAGE APPEARS TO BE NORMAL FOR HYPOTHYROIDISMHOWEVER IF YOU COULD SEND THE TSH AND T4 REPORTS V COULD TELL YOU ABOUT YOUR HYPOTHYROIDISM..YOU ALSO REQUIRE A ECG AND A CARDIOLOGIST CONSULTATION FOR THE ARRYTHMIAHOPE I HAVE ANSWERED YOUR QUESTION.. YOU CAN MESSAGE ME FOR ANY FURTHER CONCERNS