en pharmacology pharmacology Original Article Original Article <span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="color:#0000ff;"><strong><em>Background</em></strong><em>:</em></span> The aim was to describe, evaluate and document the prevention of medication errors by clinical pharmacologist consultations in patients with cancer.<br> <span style="color:#0000ff;"><strong><em>Methods</em></strong><em>:</em></span> We assessed the effect of clinical pharmacologist consultation by the acceptance of interventions recommended due to dosage, frequency, duration of therapy errors and drug-drug interactions (DDIs). All medication errors detected by clinical pharmacologist were reported in the format of medical consultation. A documentation template was designed to collect the patient&rsquo;s data (sex, age, and diagnosis), prescriptions written, and drug-specific recommendations. For the descriptive analysis of medication errors, the unit of analysis was the number and percentage of errors.<br> <span style="color:#0000ff;"><strong><em>Results</em></strong><em>:</em></span> A total of 296 patients included in this study with a median age of 48.67&plusmn;19.76 years of which 47.30% were females. 936 prescribing errors were detected and recommended for their correction. The specialist physicians accepted 897 of prescribed errors. DDIs that were detected in 66.22% of patients, were the most errors in this group of errors (47%). Improper dose (17.41%) wrong frequency (16.67%) and drug-food interaction (10.26%) were after that.<br> <span style="color:#0000ff;"><strong><em>Conclusion</em></strong><em>:</em> </span>Pharmacological consultation in the hematology-oncology ward revealed many medication errors. The trust of physicians in the views of the clinical pharmacologist led to a large part of these errors being accepted and resolved.</span></span> clinical pharmacologist, medication error, patient safety 53 58 http://caspjim.com/browse.php?a_code=A-10-1380-1&slc_lang=en&sid=1 Ali Eishy Oskoyi ma_eishy@yahoo.com 100319475328460027331 100319475328460027331 No Department of Internal Medicine, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran Hamdollah Sharifi Sharifi.h@umsu.ac.ir 100319475328460027332 100319475328460027332 Yes Inpatients Safety Research Center, Urmia University of Medical Sciences, Urmia , Iran Rahim Asghari asghari@gmail.com 100319475328460027333 100319475328460027333 No Department of Internal Medicine, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran