IRCT2015091523705N1 IRCT 2015-12-15 Vice chancellor for research, Kermanshah University of Medical Sciences Effect of Rose Essence on sexual dysfunction and happiness Comparison of Rose Essence and placebo in improving sexual disorders and increase of happiness in men treated with methadone 2015-09-18 anticipated 60 Complete https://irct.ir/trial/20207 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Other design features: Randomization will be done by coin toss and patients will be assigned to either control or experimental group. In both groups, patients and the facilitator do not know which group will receive Rose Essence and which group will receive placebo. So, it is a double-blind clinical trial. N/A Sexual dysfunction. Intervention 1: In the experimental group, the participants will receive a capsule of rose essence daily ,then the questionnaire will be re-distributed at the baseline, 4 weeks later, and at the end of the study (8 weeks after the start of the study), and the happiness and sexual function will be measured. In addition, at the beginning and end of the study, the blood sample will be sent to the laboratory in order to determine the level of the hormones T4, T3, Thyroid, and Testosterone, and the level of the hormones will be measured. Intervention 2: In the control group participant will receive a placebo capsule daily. then questionnaire will be redistributed at baseline,4 weeks later, and at the end of the study (8 weeks after the start of the study), and the happiness and sexual function will be measured. In addition, at the beginning and end of the study, the blood sample will be sent to the laboratory in order to determine the level of the hormones T4, T3, Thyroid, and Testosterone, and the level of the hormones will be measured.