Drug is a substance which may have medicinal, hallucinating, enhancing or other effects when taken into a human body and is not considered a food. In pharmacology, a drug is a chemical substance that is used in the treatment, prevention or diagnosis of a disease and or else used to enhance or modify physical and or mental well-being of an individual. Opioids or hallucinogens are the chemical substance that affects the central nervous system and are classified as recreational drugs. These drugs are perceived for the beneficial effects through its usage but some drugs can cause addiction and or habituation. Depending upon the disorder or any form of discomforts in the body, drugs can be prescribed for a limited duration of time or can be used on a regular basis for chronic disorders. Drugs are distinguished from endogenous biochemical in the aspect of its being introduction from outside into the body. Drugs whether it is medicinal or recreational can be administered in the body in a number of ways like orally, sublingually, topically, etc depending upon its target area and or time lapse expected. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information.The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on June, 2014