Objectives, Design, Setting and conduct: The aim of this research is to determine the effects of Melissa Officinalis on lipid profile in Patients with Hyperlipidemia. This study is a randomized double‐blind placebo‐controlled clinical trial. The study conducted on 60 hyperlipidemic patients who were not in clinical range to taking other antihyperlipidemic agents. Major Inclusion and Exclusion criteria: Male and female aged 25 to 65 years with cholesterol levels 200 to 260 mg/dl who do not need to take of serum lipids lowering drugs were recruited randomly. The patients with diabetes, coronary vascular disease, renal, hepatic, hematological, pulmonary, uncontrolled hypertension and also pregnant women and breast‐feeding women, patients using antihyperlipidemic agents, steroids, Cigarette, alcohol were excluded. Intervention: Treatment group received the grind powder of Melissa officinalis and control group received placebo capsules at a dose of 3 gr daily (two 500mg capsules after every main course) by the oral route for 2 months. main outcome variables: At baseline and also the end of the study, the fasting (after at least fasting for 12 h) blood serum