The present invention relates to an association of active ingredients. More specifically: to an association of cyclobenzaprine and aceclofenac. Additionally, the present invention is also related to the use of aceclofenac and cyclobenzaprine, in association for the preparation of a medicine useful in the treatment of painful muscular diseases, as well as to a method of treatment of painful muscular diseases using an association of aceclofenac and cyclobenzaprine.
