About this trial
This study is a single-center, randomized, open-label, two-period, two-sequence, single-dose, crossover bioequivalence trial conducted under fasting conditions in healthy adult volunteers. Participants will be randomized into two sequences (A and B). Each participant will receive a single intramuscular dose of the test or reference formulation according to the assigned sequence, with an adequate washout period between dosing. The primary objective of the study is to evaluate the bioequivalence of the two formulations.
Eligibility criteria
Qualifiers
Subjects have been fully informed of the study purpose, nature, procedures, and potential adverse reactions, voluntarily agree to participate, and have signed the informed consent form prior to any study-related procedures.
Male or female subjects aged 18 years or older, with an appropriate gender distribution.
Body weight: females ≥ 45.0 kg, males ≥ 50.0 kg, and body mass index (BMI) between 19.0 and 26.0 kg/m² (inclusive); BMI = weight (kg) / height² (m²).
Subjects are able to communicate effectively with the investigators and can understand and comply with all study requirements.
Disqualifiers
Known allergy to methylconalamin injection, methylconalamin injection, or any component of the formulations, or history of hypersensitivity (e.g., rash, urticaria).
History of clinically significant diseases or any other medical or physiological condition that could interfere with study results, including but not limited to disorders of the hematologic, cardiovascular, digestive, urinary, respiratory, nervous, immune, or endocrine systems, malignancy, psychiatric disorders, or metabolic abnormalities.
History of significant bleeding tendency, coagulation disorders, systemic bleeding, neutropenia, or thrombocytopenia.
Vaccination with any vaccine or live attenuated vaccine within 1 month prior to dosing, or planned vaccination during the study.
Trial design
Treatments tested in this trial
- Methylconalamin Injection(WP205)
- Methylconalamin for Injection