In 2001 Dr Janet Fraiser used an injection syringe to anesthetize a guard guarding Nirrti. (SG1: "Rite of Passage") Jack O'Neill used an injection syringe to give Samantha Carter, while under the control of the Tok'ra symbiote Jolinar of Malkshur, a dose of anesthesia strong enough to take down an elephant. (SG1: "In the Line of Duty")