Eligibility Criteria:
Inclusion Criteria
* Aged between 18 and 50 years (inclusive).
* Considered healthy after a comprehensive clinical assessment (medical history + complete physical exam).
* Body Mass Index (BMI) between 18 and 30 kg/m² (inclusive) and body weight ≥ 50 kg at screening.
* Normal blood pressure (BP) and heart rate (HR) after 10 minutes supine at screening : Systolic BP: 90-145 mmHg, Diastolic BP: 45-90 mmHg, HR: 40-90 bpm, Or values outside these ranges but judged not clinically significant (NCS) by the Investigator.
* Normal ECG at screening (10-min resting 12-lead ECG): PR interval: 110-210 ms, QRS interval : \< 120 ms, QTcF interval: ≤ 450 ms, No evidence of sinus node dysfunction, Or values outside these ranges but judged NCS by the Investigator.
* Laboratory parameters within normal ranges (hematology, biochemistry, urinalysis); slight deviations allowed if not clinically relevant per Investigator.
* Women of non-childbearing potential, or women of childbearing potential using at least one acceptable contraceptive method throughout the study and 1 month after last treatment.
* Female subjects of childbearing potential: negative pregnancy test (serum or urine) at screening and Day 0.
* Covered by Health Insurance System and/or compliant with National Law requirements for biomedical research.
* Able and willing to comply with study requirements.
* Written informed consent obtained.
Exclusion Criteria
* Unsuitable veins for repeated venipuncture.
* Relevant history/presence of cardiovascular, pulmonary, gastrointestinal, hepatic, renal, metabolic, hematological, neurological, psychiatric, systemic, or infectious disease.
* Evidence of any clinically significant acute or chronic disease.
* History of suicidal ideation or suicide attempt.
* Surgery (including clinical trial procedures) within 2 months before dosing.
* Blood donation within 2 months before dosing.
* History/presence of drug hypersensitivity, asthma, or allergy.
* Known hypersensitivity to study materials or related compounds.
* Inability/difficulty swallowing capsules.
* No possibility of emergency contact.
* Any drug intake (except paracetamol) within 4 weeks prior to dosing or \< 5 half-lives (whichever longer). Prohibited: carbamazepine, phenytoin, phenobarbital, CYP enzyme modulators.
* Use of herbal products affecting CYP enzymes within 2 weeks or \< 5 half-lives before dosing.
* Special diets (vegetarian, vegan, gluten-free).
* Vigorous exercise from 4 days before dosing until post-study assessments.
* Pregnant or breastfeeding women.
* Drug/alcohol abuse history, daily alcohol intake \> 4 drinks, or positive alcohol test.
* Excessive xanthine beverages (\> 5 cups/day).
* Nicotine use \> 5 cigarettes/day or inability to abstain 48h before and during study.
* Intake of grapefruit/Seville oranges/poppy seed or other CYP modulators 1 week before dosing and during study.
* Intake of methylxanthines (coffee, tea, cola, cocoa, mate, guarana, chocolate) or quinine (e.g., tonic water) from 48h before dosing and during study.
* Unable/unwilling to follow diet requirements (see protocol section 10.7).
* Positive test for HBsAg, HCV antibody, or HIV 1/2.
* Positive drug screen.
* Significant biological or clinical abnormalities judged incompatible with study.
* Participation in another interventional trial during exclusion period or investigational product within last 60 days or \< 5 half-lives.
* Under guardianship, curatorship, or deprived of liberty.
* Under Court protection.
* Would exceed €6000 compensation for biomedical research in last 12 months (including this study).
* Health status not allowing provision of informed consent.