Classification Of Drugs According To Pharmacological Effect

A drug is a chemical substance which is characterized by a defined chemical, physical and biological properties, any slight change in its chemical structure can cause great change in the host’s body and can cause maybe desired or undesired effects. It aims for treating, curing diseases and illuminating its symptoms by an exact mechanism that differs from drug to another according to the drug’s therapeutic effect, time taken by a drug to perform its action and the disease needed to be illuminated. Drug is related to pharmacy which is a Greek word ‘pharmakon’, which means (medicine or drug). It is formulated by means of chemists or pharmacists who can deal with drugs and form formulas that has no side effects and cause no adverse reaction that can cause harm to the host so they are responsible for monitoring the patient’s health.Classification Of Drugs According To Pharmacological Effect

Drugs are always formulated in form of a dosage form, mixed with excipients, which gives the drug its stability and its unique shape. Dosage form is the carrier of drug which carry drug to its site of action in the body, which allow safe transfer of exact amount of drug to the place required to perform its function. Each drug has its own monograph which is the descriptive material of this drug. This monograph is listed in pharmacopoeia which is a legal authority for standardization of this drug. Drugs maybe from natural sources or synthetic ones. They are found in various forms as tablets, capsules, syrup, injections. This variety in forms of drug aims to suit the patient’s need and the condition of each patient. For example if a person suffers from vomiting he can’t take either tablets or capsules, but he can take injections.