Flexeril or cyclobenzaprine or baclofen are not associated with
hoarseness of voice. More plausible causes of
hoarseness of voice need
to be checked like acute laryngitis, vocal cord nodules, allergies, gastro esophageal reflux, smoking, thyroid problems, trauma to larynx, parkinson’s disease and trauma to larynx. Consult an otolaryngologist who will evaluate the causes and treat likewise. Cough suppressants for laryngitis, treat GERD, stop smoking, vocal rest etc will make a difference.