Clinical pharmacology encompasses all aspects of the relationship between drugs and humans. For healthcare professionals, clinical pharmacology is important because it is the scientific discipline that underpins the rational prescribing of medicines to alleviate symptoms, treat illness and prevent future disease. Medicines contain drugs (the specific chemical substances with pharmacological effects either alone or in combination, in a formulation mixed with other ingredients. The beneficial effects of medicines must be weighed against potential adverse drug reactions and interactions, often caused by injudicious prescribing decisions and by prescribing errors, and their cost. Designed with advanced technology and insight from extensive customer research, Clinical pharmacology powered by Clinical Key also enhances the user experience with Smart Search for top speed to answers, deep access to trusted evidence and the ability to absorb relevant content quicker for optimal point-of-care productivity. The information can be published in our peer reviewed journal with impact factors and are calculated using citations not only from research articles but also review articles (which tend to receive more citations), editorials, letters, meeting abstracts, short communications, and case reports. The inclusion of these publications provides the opportunity for editors and publishers to manipulate the ratio used to calculate the impact factor and try to increase their number rapidly. Impact factor plays a major role for the particular journal. Journal with higher impact factor is considered to be more important than other ones.