Psychopharmacology (Ways drugs can enter the body)

Oral Administration (PO)

The drug is ingested by mouth and absorbed through the digestive system.

Intravenous Injection (IV)

The drug is injected directly into a vein.

Intramuscular Injection (IM)

The drug is injected directly into a large muscle.

Subcutaneous Injection (SC)

The drug is injected into the tissue layer between the skin and the muscle.

Inhalation

The drug is breathed into the lungs, where it is absorbed through the pulmonary membranes.

Topical Administration

The drug is applied directly to the skin or mucous membranes.

Sublingual Administration

The drug is placed under the tongue.

Buccal Administration

The drug is placed between the gums and cheek.

Rectal Administration

The drug is introduced into the rectum, where it is absorbed through the rectal

Intraperitoneal Injection (IP)

The drug is injected into the peritoneal cavity.

Insufflation (Nasal Administration)

Sniffed into nasal mucosa.

Intracerebral Administration

Injecting directly into a specific brain region.