Routes of Administration :       The route of administration is determined by properties of the drug (like Water/Lipid soluble , Ionization) and by therapeutic objectives (like need of rapid onset , need of long term onset or restriction of delivery to local site). => Major route for drug administration are Enteral, Parental, and topical.  1) Enteral :            Enteral administration (adminstering a drug by mouth) is the most common, convenient, and economical method of drug administration.  => The drug may be swallowed, allowing oral delivery, or it may be placed under tongue (sublingual) or between the gums and cheek(buccal), facilitating the direct absorption in to blood stream.                              (1) ORAL :            • Oral administration provide many advantages like:  (i) Most convenient method for ...