Safety, Tolerability, and Pharmacokinetics of CSX-1004

Major Inclusion Criteria: * Healthy male or female subjects, aged 18 to 50 years, inclusive, * Minimum weight of 50.0 kg and maximum weight of 100.0 kg * Body mass index (BMI) within the range of 18.0 to 32.0 kg/m2, inclusive Major Exclusion Criteria: * Positive UDS for substances of abuse (including alcohol) at Screening or admission to the Treatment Phase * Current daily cigarette smoker within 3 months of Screening. Social smoking, as defined by non-daily use of nicotine-containing products, is permitted. * History or presence of any clinically significant cardiac, psychiatric, endocrine, hematologic, hepatic, immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, renal, or other major disease or illness at Screening, which in the opinion of the Investigator, might jeopardize the safety of the subject or the validity of the study results.