Prefilled syringe injector

An injector, comprising:

• a prefilled syringe comprising:
• a container portion defining a fluid chamber containing a medicament;
• needle disposed at a distal end of the chamber, having an injecting tip configured for piercing an insertion location, and defining a fluid pathway in fluid communication with the fluid chamber for injecting the medicament from the fluid chamber into an injection site;
• a plunger movable within the fluid chamber;
• and
• a housing that houses the prefilled syringe and is configured for allowing insertion of the needle at the injection location to an insertion point that is at a penetration depth of up to about 5 mm below a surface at the insertion location;
• a syringe support supportively mounting the prefilled syringe to the housing;
• and
• an energy source configured for biasing the plunger with a force selected to produce an injecting pressure in the medicament in the fluid chamber that substantially remains between about 80 psi and 1000 psi during injection of the medicament to inject the medicament from the fluid chamber through the needle to the injection site remote from the injecting tip,
• wherein the penetration depth and the injecting pressure are sufficient to substantially prevent backflow of the injected medicament,
• wherein the energy source is configured for biasing the plunger with a force of about 10 pounds to about 15 pounds, and
• wherein the energy source and the needle are configured for injecting the medicament at a rate of lower than about 0.75 mL/sec.