To study the safety and effectiveness of the maximum tolerated dose of zamicastat, found in BIA-51058-201, in the treatment of long-term PAH.

Recruitment & Eligibility

Status: ot Recruiting

Sex: All

Target Recruitment: 40

Inclusion Criteria

1. Have performed MPV3 of the preceding study BIA-51058-201.
2. Able to comprehend and willing to sign an informed consent form.
3. For women: Agree not to donate ova from the time of informed consent until 30 days after the last IMP intake.
For men: Agree not to donate sperm from the time of informed consent until 90 days after the last IMP intake.
Are the trial subjects under 18? no
Number of subjects for this age range:
F.1.2 Adults (18-64 years) yes
F.1.2.1 Number of subjects for this age range 35
F.1.3 Elderly (>=65 years) yes
F.1.3.1 Number of subjects for this age range 5

Exclusion Criteria

1. Significant non-compliance with the protocol during the preceding study BIA-51058-201 which may have an impact on this extension study. 2. WHO functional class IV as judged by the investigator. 3. Two or more consecutive measurements of systolic blood pressure (SBP) < 95 mmHg or diastolic blood pressure (DBP) < 50 mmHg, measured at visit V1. 4. Uncontrolled diabetes mellitus with HbA1c = 8.5% within the last three months or at visit V1. 5. Occurrence of an AE during the preceding study which is judged by the investigator as contraindicative to further participation in the extension study. 6. Any disease known to cause pulmonary hypertension other than PAH WHO Group 1. 7. Obstructive lung disease: Forced Expiratory Volume in 1 second/Forced Vital Capacity (FEV1/FVC) < 60% and FEV1 < 60% of predicted value after bronchodilator administration, as demonstrated and documented by previous spirometry data which, in the opinion of the investigator, represent the clinical state of the patient at the time of visit V1. 8. Restrictive lung disease: Total Lung Capacity (TLC) < 70% of predicted value, as demonstrated and documented by previous spirometry data which, in the opinion of the investigator, represent the clinical state of the patient at the time of visit V1. 9. History of moderate to severe hepatic impairment (Child-Pugh B and C). 10. Estimated glomerular filtration rate (eGFR) < 30 mL/min/1.73 m2 (measured at MPV1 of study BIA-51058-201). 11. Use of the following prohibited medication or treatments during study participation: calcium channel blockers (CCBs) if used for the treatment of PAH in vasoreactive patients; drugs containing a catechol group that is metabolised by DßH (e.g. rimiterole, isoprenaline, dopamine, dopexamine or dobutamide) or a- and/or ß-blockers. 12. Presence of any other significant or progressive/unstable medical condition that, in the opinion of the investigator, would compromise evaluation of the study treatment or may jeopardise the patient’s safety, compliance or adherence to protocol requirements. 13. For women: Pregnancy or breast-feeding. Women of childbearing potential unable or unwilling to undergo pregnancy tests and practice highly effective contraceptive measures in combination with a barrier method e.g. condom, occlusive cap (diaphragm or cervical/vault caps) with spermicidal gel/film/cream/suppository from the time of informed consent until 30 days after the last IMP intake. Highly effective methods for women are surgical intervention (e.g. bilateral tubal occlusion), non-hormonal implantable intrauterine device, true sexual abstinence (i.e. when this is in line with the preferred and usual lifestyle of the patient) and vasectomised partner (provided that the partner is the sole sexual partner of the patient and the partner has received medical assessment of the surgical success). Periodic abstinence (e.g., calendar, ovulation, symptothermal, post-ovulation methods), hormonal contraceptives and withdrawal are not acceptable methods of contraception. For men: Male patients who are sexually active with a partner of childbearing potential must use, with their partner, a condom plus an approved acceptable contraceptive measure from the time of informed consent until 90 days after the last IMP intake. The following methods are acceptable methods of contraception: partner’s use of combined (oestrogen and progestogen-containing) hormonal contraception associated with inhibition of ovulation (oral, intravag

Study & Design

Study Type: Interventional clinical trial of medicinal product

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method

Secondary Outcome Measures

Name	Time	Method

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