Pharmacokinetic stopping criteria for the study were met.

The purpose of this study is to test the safety and efficacy of an investigational neuromuscular blocking agent called CW002 and to document its effects on healthy adult volunteers. A neuromuscular blocking agent is a drug that temporarily prevents muscles from moving. CW002 has not yet been approved by the Food and Drug Administration (FDA).

Usually, neuromuscular blocking agents are used together with other drugs that put people completely "asleep". These drugs allow doctors to place a breathing tube in the airway, stop muscles from moving during surgical operations, and allow ventilation (movement of air).

This research is being done because CW002 is expected to act quickly and to provide a muscle block of intermediate (not too long, not too short) duration. The researchers would like to test increasing doses of CW002 that can be given without causing severe side effects. If shown to be both safe and effective, such a compound would be useful in surgical procedures and could improve future anesthetic care.

Neuromuscular blocking agents are especially important in intubation (insertion of breathing tube into the windpipe) because a quick and effective muscle block is needed to promptly complete the process and secure the airway. In addition, being able to rapidly reverse a blocking agent is desirable so that the patient can breathe on his/her own as soon as possible.

Inclusion Criteria:

• Is male or female in good health (ASA I) between the ages of 18 and 49 years inclusive, with no concurrent disease or illness. Females must be non pregnant, non lactating, and practicing an acceptable method of birth control (e.g., barrier, oral contraceptive, vasectomized partner, abstinence) or be surgically sterile or post menopausal. A pregnancy test will be performed at Screening and on Day 1 to confirm non-pregnant status of female subjects.
• Weighs between 55 and 95 kg, inclusive, and has a body mass index (BMI) between 18 and 30 kg/m2 (BMI calculated as weight in kg/[height in m]2 )
• Agrees to abstain from taking any dietary supplements or non-prescription drugs (except for multivitamins or as authorized by the Investigator and Medical Monitor) for 3 days prior to Baseline through Follow-Up
• Agrees to abstain from taking any prescription drugs (except as authorized by the Investigator and Medical Monitor) during the 14 days prior to Baseline through Follow-Up
• Agrees to abstain from consuming alcohol-containing beverages for 3 days prior to Baseline through Follow-up
• Is in good health (ASA Class I) based on medical history and clinically acceptable results on the following assessments: physical examination, vital signs, 12 lead ECG, clinical chemistry, hematology/coagulation, and urinalysis. Seated systolic BP must be > 90 mmHg and ≤ 140 mmHg and seated diastolic BP must be > 50 mmHg and ≤ 90 mmHg at Screening and Baseline
• Has no history of cardiovascular, pulmonary, renal, hepatic, central nervous system, or neuromuscular disease, or history of asthma or diabetes (ASA Class I)
• Is able to communicate effectively with study personnel and is considered reliable, willing, and cooperative in terms of compliance with the protocol requirements
• Voluntarily gives written informed consent to participate in the study
• Has available a responsible adult who has agreed to transport the subject home

Exclusion Criteria:

• Has any current acute or chronic disease
• Has a history of any clinically important medical disorder including any of the following: cardiovascular, pulmonary, hepatic, renal, CNS or neuromuscular disease, asthma or diabetes
• Has a history of anaphylaxis, a documented hypersensitivity reaction, or a clinically important idiosyncratic reaction to any drug
• Has a history of neuromuscular junction disease (e.g., myotonic dystrophy, polio, myasthenia gravis, botulism poisoning)
• Has a history of malignant hyperthermia
• Has had recent (within 2 weeks) use of aminoglycoside antibiotics or corticosteroids
• Has a history of sleep apnea
• Has a history of prior anesthetic complications
• Has any history of asthma requiring management for reactive airway disease
• Has a history of an anatomic airway abnormality or indication of an airway abnormality assessed during the Screening airway examination that could interfere with laryngoscopy or tracheal intubation
• Has a history of Human Immunodeficiency Virus (HIV) infection or Acquired Immune Deficiency Syndrome (AIDS), or has a history of viral hepatitis (other than Hepatitis A)
• Has a history of malignancy within the past 5 years, with the exception of successfully treated non-metastatic basal cell or squamous cell carcinomas of the skin and/or localized carcinoma in situ of the cervix
• Has a predisposing condition that could interfere with the absorption, distribution, metabolism, or excretion of drugs or any condition that may confound the PK analyses, particularly hepatic or renal disease
• Has received another investigational drug within 30 days prior to the Screening Visit
• Has a history of alcohol abuse (regularly drinks more than 4 units of alcohol per day; 1 unit = ½ pint of beer, 1 glass of wine, or 1 ounce of spirit) and/or evidence of any use within 3 days prior to Baseline
• Has a history or current evidence of abuse of licit or illicit drug substances or a positive urine drug screen for drugs of abuse
• Currently uses tobacco-containing products or has a history of tobacco use within 6 months prior to the Screening Visit
• Has donated blood or plasma within 60 days prior to the Screening Visit
• Has an abnormal bleeding tendency