If you are speaking of cyclobenzeprine, it is meant to be a short term drug-2-3 weeks at most although I know some drs give it much longer. Cyclobenzeprine is actually chemically/structurally related to tricyclic antidepressants (like amitriptyline, nortriptyline, and imipramine). Pharmacologic similarities among the tricyclic drugs require that certain withdrawal symptoms be considered when FLEXERIL (cyclobenzaprine hcl) is administered. Abrupt cessation of treatment after prolonged administration may produce nausea, headache, and malaise, irritability, restlessness and sleep disturbances. These are not indicative of addiction however. Long term use side effects are similar as well. You can get the same anticholinergic effects like dry mouth and urinary retention etc. Weight gain, loss of libido (decreased sex drive), increased intraocular pressure, orthostatic hypotension (which is a drop in blood pressure upon standing causing dizziness and/or fainting if it drops low enough) are possible. High doses can cause changes in the heart like arrhythmias and sinus tachycardia (rapid heart rate). There is also a possiblity of tardive dyskinesia which is abnormal, involuntary movements of facial muscles, mouth, head and neck but I dont think there have been any documented cases of cyclobenzeprine causing tardive dyskinesia as of yet but theoretically it is possible because of the relationship to the tricyclics.
- Cyclobenzaprine Information for Consumers
- Cyclobenzaprine Information for Healthcare Professionals (includes dosage details)
- Side Effects of Cyclobenzaprine (detailed)
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