Needle-free jet injector provides an alternative for patients with diabetes treated by insulin. This study aimed at evaluating pharmacokinetics and pharmacodynamics (PK-PD) profiles of lispro administered by jet injector and conventional pen.

This is a randomized, double-blind, double-dummy, crossover study. Eighteen healthy volunteers will be recruited. Lispro (0.2 units/kg) will be administered by jet injector or by conventional pen and a seven-hour euglycemic clamp test will be performed. PK-PD profiles of lispro will be calculated.

Inclusion Criteria:

1. The range of height should be 170±10cm.
2. The range of weight should be ±10%kg.
3. Liver and renal function should be normal.
4. Health subjects with no chronic diseases or medications.

Exclusion Criteria:

1. Drug allergy, history of allergic disorders or allergies.
2. A history of liver or kidney disease.
3. Smoker, drinkers.
4. Subjects who participated in other drug trials within a month.
5. Subjects who used medication which is known to organ damage.