en Evidence Based Medicine: Clinical Trials فارماكولوژی و سم شناسی Pharmacology & Toxicology مروری Review <div dir="ltr" style="text-align: justify;"><span new="" roman="" times="">Evidence based medicine is very important for success of modern medicine. It is the ongoing process of using the most reliable evidence from clinical studies, scientific understanding and medical practice to make the best possible medical choice for patients. Evidence based medicine is how medicine advances and how we get improvements in life expectancy and quality of life. It not only identifies which treatments are effective but also those which are ineffective and may do more harm than good, and identifies areas where more investigation is needed and where there may be gaps in knowledge. In this review we focus on clinical trials.</span></div> <div style="text-align: justify;"><span new="" roman="" style="FONT-FAMILY: " times="">Evidence based medicine is very important for success of modern medicine. It is the ongoing process of using the most reliable evidence from clinical studies, scientific understanding and medical practice to make the best possible medical choice for patients. Evidence based medicine is how medicine advances and how we get improvements in life expectancy and quality of life. It not only identifies which treatments are effective but also those which are ineffective and may do more harm than good, and identifies areas where more investigation is needed and where there may be gaps in knowledge. In this review we focus on clinical trials.</span></div> Clinical trial, Clinical Research, Evidence based medicine Clinical trial, Clinical Research, Evidence based medicine 1 4 http://jmp.ir/browse.php?a_code=A-10-34-1&slc_lang=en&sid=1 L Kashani L Kashani 100319475328460036486 100319475328460036486 No Infertillity ward, Arash Hospital, Tehran University of Medical Sciences, Tehran, Iran Infertillity ward, Arash Hospital, Tehran University of Medical Sciences, Tehran, Iran R Hajiaghaee R Hajiaghaee 100319475328460036487 100319475328460036487 No Pharmacognosy & Pharmaceutics Department of Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran Pharmacognosy & Pharmaceutics Department of Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran S Akhondzadeh S Akhondzadeh 100319475328460036488 100319475328460036488 Yes Psychiatric Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran