Oral administration. This is the most frequently used route of drug administration and is the most convenient and economic. …
Sublingual. …
Rectal administration. …
Topical administration. …
Parenteral administration. …
Intravenous injection.
Sometimes a drug is given through the skin—by needle (subcutaneous, intramuscular, or intravenous route), by patch (transdermal route), or by implantation.
The route by which the medicines are directly introduced into the bloodstream through a vein is known as intravenous route of administration. The intravenous route is considered to be the fastest route of drug administration. The injections and the infusions are administered by this route have 100% bioavailability
