41 man

4mg of Tizanidine tanks my
Blood pressure and pulse

I take half of 2mg now (1mg)

Anyone take it for muscle or pain

Is it dangerous? I have Inappropriate sinus tachycardia
My echocardiogram is normal
Ejection fraction and LV function normal

Thoughts opinions?

Slow heartbeat is a known side effect:

[medlineplus.gov]

It's also a "call your doctor" event. Have you discussed your unpleasant side effects with the prescribing physician?

ETA: it can also cause low blood pressure:

[www.healthline.com]

I'd definitely contact my doctor.



Edited 1 time(s). Last edit at 02/27/2025 02:32PM by NBeener.

I took Tizandine (Zanaflex) about 12 years ago. I saved the bottle, and wrote on the bottle that this drug slowed my HR way down, and also caused an erratic Heartbeat. I remember it was a bad experience, although I took it at 6mg over 4 hours. I am reading that the type of IR Heartbeat caused can be QT prolongation, which can be very serious.

The dosage of a drug that impacts the heart is important, so it it sounds wise to cut the dose down low enough that repeated EKG's are normal, and you don't have noticeable side effects relating to HR and BP.