Collocations for injection - noun

intramuscular, intravenous
painkilling
tetanus (esp. BrE) (usually tetanus shot in AmE)
insulin, penicillin, etc.
Botox™, collagen
booster (esp. BrE) (usually booster shot in AmE)
Can I bring my dog in for his booster injection?

lethal
In some states execution is by lethal injection.

regular
daily, weekly

have
He had to have a tetanus injection after injuring himself. (esp. BrE)

administer, give sb, perform
They gave her an injection to stop the pain. (esp. BrE)

get, receive
The rats received a daily injection of the drug.

by injection
The best treatment is antibiotics, preferably by injection.

injection against
an injection against whooping cough

injection for
injections for diabetes

injection in, injection into
an injection into the vein

injection with
Both groups received a second injection with the same solution.

massive, substantial (BrE)
The infrastrucure requires a massive cash injection.

much-needed
capital, cash
An undisclosed buyer will provide a much-needed cash injection for the fragile balance sheet.

need, require
give sth, provide (sth with)
get, receive

injection from
a cash injection from the state

injection into
an injection of cash into the economy

an injection of capital, cash, resources, etc.
The company had reached the size where it needed an injection of capital.