Injection
An injection was a medical procedure whereby a drug or other substance was introduced into a lifeform, usually for the purpose of effecting healing. While injections prior to the 22nd century were delivered via a needle, hyposprays were mostly used from that point onward. The Malon used subdermal injectors. ()

In 2268, Henoch, inhabiting Spock's body, worked in the pharmacology laboratory of the  to prepare a metabolic reduction injection for the bodies occupied by Sargon's people. ()

Injections could be administered intramuscularly, intravenously, or subdermally. (; )

The Borg used their assimilation tubules to inject nanoprobes into the individuals they're assimilating. (; )

In 2154, Starfleet officer Hoshi Sato was kidnapped from her post on  by Dolim's order. Sato's synaptic pathways were altered through a series of parasitic injections into her neocortex. This was to force Sato to break the Xindi-Aquatic encryption protocols, giving Dolim the launch codes to the Xindi weapon. ()

An injection of inaprovaline could be given to counteract the effects of being drunk. ()

Types 
 Contraception injection
 Cytokinetic injection
 Cytolytic injection ()
 Isomorphic injection
 Lethal injection

External link 
 
Medical procedures