You should not use cyclobenzaprine if you are allergic to it, or if you have: a thyroid disorder; heart block, heart rhythm disorder, congestive heart failure; or if you have recently had a heart attack. Cyclobenzaprine is not approved for use by anyone younger than 15 years old. Do not use cyclobenzaprine if you have taken… Continue reading What is the important information I should know before I take Cyclobenzaprine ?