 The purpose of the study is comparing two drugs efficacy for the treatment of pain originates from masticatory muscles. The two drugs are - Amitriptlyne amitriptyline and Gabapentin gabapentin, both of them are common use in for the treatment of chronic pain Methods - patient that is diagnosed as suffering from myofacial pain, will receive one of the medications above Gabapentin or amitriptyline for one month only, after which he will be invited to pain clinic for control. Two weeks after that, the patient will start taking the other drug for 1 month and then invited again to the department for recall and continue standard treatment . The patient can choose whether to continue medication with one of the drugs or stop this medication treatment. Total duration of the experiment is two and a half months. 