Bioavailability Study of 300 mg Trazodone Hydrochloride (New Polymer) vs. 300 mg Trazodone Hydrochloride (Contramid® Prolonged-release Tablets) Under Fasting Conditions

Inclusion Criteria:

* Informed consent: signed written informed consent before inclusion in the study
* Sex and Age: men and women, 18-45 years old inclusive
* Body Mass Index (BMI): 18.5-30 kg/m2 inclusive
* Vital signs: systolic blood pressure 100-139 mmHg, diastolic blood pressure 50-89 mmHg, heart rate 50-90 bpm, measured after 5 min at rest in the sitting position
* Full comprehension: ability to comprehend the full nature and purpose of the study, including possible risks and side effects; ability to co-operate with the Investigator and to comply with the requirements of the entire study
* Contraception and fertility : men and women of child-bearing potential and with an active sexual life must be using at least one of the following reliable methods of contraception throughout the study:
* Hormonal oral, implantable, intrauterine device \[IUD\], transdermal, or injectable contraceptives for at least 2 months before the screening visit (women only)
* A non-hormonal intrauterine device or female condom with spermicide or contraceptive sponge with spermicide or diaphragm with spermicide or cervical cap with spermicide for at least 2 months before the screening visit (women only)
* A male sexual partner who agrees to use a male condom with spermicide (women only)
* A vasectomised partner (women only)
* A male condom with spermicide (men only)
* A sterile sexual partner Female participants of non-child-bearing potential or in post-menopausal status for at least 1 year will be admitted

Exclusion Criteria:

* Electrocardiogram (ECG): clinically significant abnormalities at 12-lead ECG in supine position
* QTc: QTcF\>430 msec for men and QTcF\>450 msec for women at screening
* Cardiac disorders: history of risk factors for torsade de pointes, such as heart failure, significant cardiac arrhythmias, significant cardiac conduction abnormalities, family history of long QT syndrome, cardiac hypertrophy, cardiomyopathy, chronic cardiac insufficiency
* Physical findings: clinically significant abnormal physical findings which could interfere with the objectives of the study
* Laboratory analyses: clinically significant abnormal laboratory values indicative of physical illness
* Allergy: ascertained or presumptive hypersensitivity to the active principle and/or formulations' ingredients; history of anaphylaxis to drugs or allergic reactions in general, which the Investigator considers may affect the outcome of the study
* Diseases: history of significant renal, hepatic, gastrointestinal, cardiovascular, respiratory, skin, haematological, endocrine or neurological diseases that may interfere with the aim of the study
* Medications: medications, including over the counter (OTC) medications and herbal remedies and in particular concomitant intake of potentially hepatotoxic drugs or hepatic/gastric enzyme inducers (i.e. phenobarbital, phenytoin, carbamazepine, chlorzoxazone and rifampicin) for 2 weeks before the start of the study. Hormonal contraceptives for women will be allowed
* Investigative drug studies: participation in the evaluation of any investigational product for 3 months before this study. The 3-month interval will be calculated as the time between the first calendar day of the month that follows the last visit of the previous study and the first day of the present study
* Blood donation: blood donations for 3 months before this study
* Drug, alcohol, caffeine, tobacco: history of drug, alcohol \[\>1 drink/day for women and \>2 drinks/day for men, defined according to USDA Dietary Guidelines 2015-2020 (18)\], caffeine (\>5 cups coffee/tea/day) or tobacco (\> or equal 6 cigarettes/day) abuse;
* Drug test: positive drug test at screening or day -1
* Alcohol breath test: positive alcohol breath test at day -1
* Diet: abnormal diets (\<1600 or \>3500 kcal/day) or substantial changes in eating habits in the 4 weeks before this study; vegetarians
* Pregnancy: pregnant or lactating women; positive or missing pregnancy test at screening or day -1