Can you be more specific? What medicines are you referring to? Subcutaneous injection, Intravaneous injection, Intramuscular injections? Oral dosages?

No you do not. You will have to however have very specific jetting.

Killing an individual with an injection, while highly unadvisable and complete illegal, could be done with a specific chemical designed to stop bodily functions. As with Lethal Injection in compliance with the Death Penalty of the US legal system - in some cases a criminal can be put to death with an injection.

Thermoplastic injection moulding is the process of injected hot plastic or glass into a mould to form a specific shape or product. Often used to make smaller parts for toys or machinery.

Injections are given for treatment while vaccines are given to produce antbodies to protect the recipients from specific diseases