You should not take  Norflex if you have urination problems, an enlarged prostate, glaucoma, a stomach ulcer or blockage in your digestive tract, trouble swallowing, or myasthenia gravis.
Before taking this medicine
You should not use Norflex if you are allergic to it, or if you have:
urination problems;
an enlarged prostate;
glaucoma;
a stomach ulcer;
a blockage in your stomach or intestines;
trouble swallowing; or
myasthenia gravis.
To make sure Norflex is safe for you, tell your doctor if you have:
heart disease;
a heart rhythm disorder;
coronary artery disease; or
if you also use a narcotic (opioid) medication.
It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
It is not known whether orphenadrine passes into breast milk or if it could affect the nursing baby. Tell your doctor if you are breast-feeding.
Norflex is not approved for use by anyone younger than 18 years old.
