This Phase I clinical study is designed to evaluate the safety and determine the maximum tolerated dose (MTD) of Orialpha (BD-C) in healthy adult volunteers.

This Phase I, single-arm, open-label, dose-escalation clinical study is designed to evaluate the safety and determine the maximum tolerated dose (MTD) of Orialpha (BD-C) in healthy adult volunteers. The study aims to:

• Determine the frequency and severity of treatment-related adverse events, adverse events leading to discontinuation, and serious adverse events (SAEs) within each cohort.
• Assess the effects of Orialpha on hematology and biochemistry parameters before dosing and after the final dose in each cohort.

Healthy volunteers who meet all eligibility criteria will receive the investigational product for 7 days. The first cohort will include 3 participants receiving the lowest dose (0.25 × the anticipated clinical dose). Following safety evaluation, subsequent cohorts will receive higher dose levels (0.5 ×, 1.0 ×, 1.5 ×, and 2.0 × the anticipated clinical dose) according to predefined dose-escalation rules.

Inclusion Criteria:

1. Healthy male or female, aged 18 to 60 years.
2. No clinically significant abnormalities in hematology, biochemistry, electrocardiogram (ECG), or vital signs as assessed by the investigator.
3. Willing to voluntarily participate in the study by signing the informed consent form.
4. Able to comply with study procedures and treatment as assessed by the investigator.

Exclusion Criteria:

1. History of allergy to herbal-derived drugs similar to the investigational product or any excipient.
2. Current or prior participation in another clinical trial involving an investigational product within the past 4 months.
3. Use of immunosuppressive drugs within 28 days prior to the first dose of Orialpha.
4. Active autoimmune disease or documented history of autoimmune disease within the past 2 years.
5. History of primary immunodeficiency.
6. Presence of any acute or chronic illness requiring treatment.
7. Inability to comply with study procedures or investigational product administration as assessed by the investigator.
8. Female subjects who are pregnant or breastfeeding, or male or female subjects of reproductive potential not using effective contraception.
9. Any condition which, in the opinion of the investigator, would interfere with the evaluation of the investigational treatment, patient safety, or interpretation of study results

No blinding is performed. This is an open-label study in which participants, investigators, and study staff are aware of the investigational product being administered.