Study to Evaluate the Safety/Tolerability, PK and PD After Intravenous DWJ1521 Administration in Healthy Volunteers

Inclusion Criteria: 1. Healthy adults aged ≥ 19 and ≤ 50 years at screening 2. Subjects with a body weight of ≥ 55.0 kg to ≤ 90.0 kg with a body mass index (BMI) of ≥ 18.0 and ≤ 28.0 at screening ☞ BMI(kg/m2) = weight (kg) / {Height (m)}2 3. Subjects who have given written consent on voluntary decision of participation prior to the screening procedure after being fully informed of and completely understanding this study 4. Subjects eligible to participate in the study at the discretion of the investigator by physical examination, laboratory tests, investigator questioning, etc. Exclusion Criteria: 1. Present or prior history of clinically significant hepatic, renal, nervous system, immune, respiratory, and endocrine diseases, hematologic and oncologic diseases, cardiovascular diseases, or mental diseases 2. Gastrointestinal diseases (gastric ulcer, gastritis, gastric cramps, gastroesophageal reflux, Crohn's disease, etc.) that may affect the safety and pharmacokinetic evaluation results of investigational drugs and those with a history of gastrointestinal surgery (except for appendix surgery and hernia surgery alone). 3. Helicobacter pylori positive.