As mentioned in the introduction to this book, the line between the standard therapy and the best therapy possible, commonly, is in the pharmacists’ hands. Monitoring activities is primarily the responsibility of the physician. Due to the broad knowledge of pharmacists about drugs, pharmacology, and drug interactions, there is the necessity of this professional to monitor, observe, and report the possible intercurrences after prescription and intercurrences after administration. A clinical pharmacist should monitor drug therapy in the institution and consult on medication therapies that require special expertise to ensure their safety and efficacy, such as total parenteral nutrition, anticoagulation, or treatment with aminoglycoside antibiotics (World Health Organization. Hospital pharmacy management. In: Managements science for health. http://apps.who.int/medicinedocs/documents/s19622en/s19622en.pdf . 2012).