TY - JOUR T1 - Cellular resistance mechanisms in cancer and the new approaches to overcome resistance mechanisms chemotherapy JF - Saudi Medical Journal JO - Saudi Med J SP - 329 LP - 344 DO - 10.15537/smj.2023.44.4.20220600 VL - 44 IS - 4 AU - Hajir A. Al Saihati AU - Ali A. Rabaan Y1 - 2023/04/01 UR - http://smj.org.sa/content/44/4/329.abstract N2 - Despite major advancements in cancer healing approaches over the last few decades, chemotherapy remains the most popular malignancy treatment. Chemotherapeutic drugs are classified into many kinds based on their mechanism of action. Multidrug resistance (MDR) is responsible for approximately 90% of fatalities in malignancy cases treated with standard chemotherapeutics or innovative targeted medicines. Many innovative prospective anti-cancer medicines displayed high anti-cancer efficacy in a single application. However, combining them with other medications improves cancer treatment efficacy. This supports the belief that a combination of drugs is significantly more effective than a single medicine. Due to the intricacy of MDR processes and the diversity of tumor illnesses, there will rarely be a single medicine that can be utilized to treat all types of cancer. Finding new medications that can reverse MDR in malignancy cells will augment efficacy of chemotherapeutic agents and allow us to treat cancers that are now incurable. ER -