DRUG

Drug it is a substance used for diagnosis prevention treatment or cure of a disease route of drugs Administration oral route parenteral route cutaneous or topical inhalation route rectal route sublingual route oral route the most common route of drug administration drug are given by mouth more frequently then by any other route advantage it is safe convenient and economical self medication it is possible complication of parental therapy avoided disadvantage onset of drug action it is slower than parental root drug which are bitter in test cannot be administered drug providing nausea vomiting cannot be administered this route is not possible in an unconscious patient sublingual route the drug is placed under the tongue it is allowed to dissolve in the mouth the rapidly soluble drug can be used example nitroglycerin advantage onset of action is quick inactivation of drug is the stomach in avoided the drug introductory into systematic circulation without activation in the liver rectal route the drug is placed inside rectum or suppository or enema this route is sometimes used when oral injection is not possible due to some reason like frequent vomiting example indomethacin is given by this route inpatient of rheumatoid arthritis with peptic ulcer advantage this route is frequently used when nausea vomiting are present irritation of gastric mucosa is avoided it is suitable for those drug which are destroyed by gastric acidity converted in the terminally ill patient those drug which are destroyed during first pass thought liver can also be given thought this route inhalation route the drug are in held in the form of vapour and absorption of drug occour throught respiratory tract mucosa example general anaesthesia gases volatile liquid aerosols