I recently was put on Zanaflex as a migraine preventative. I take 3/4 a pill every night (tablets are 4mg each) I have noticed my blood pressure being high recently and taking this pill is the only thing I have changed as far as medication. Anywhere from 120/81 to 139/85. My blood pressure typically is really low 90 s/70 s so for me this is high. Before I make a dr. appt I was curious if this could be a side effect to Zanaflex and I should not take it anymore and see if things regulate better.