The aim of the study is to investigate the safety of the concomitant administration of ACT-334441 with cardiovascular drugs.
The study will consist of two parts: a pilot part (Part A) that will be completed prior to the start of the main part (Part B). The Subjects who will participate in Part A are excluded from Part B.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
10
capsule containing ACT-334441 at a strength of 2 mg
capsule containing ACT-334441 at a strength of 4 mg
ACT-33441-matching placebo
BIOTRIAL
Rennes, France
PR intervals measured by 12-lead ECG (Part A + Part B)
Absolute PR intervals and corresponding changes from baseline at the different days of measurement
Time frame: Days 1 and 6 (Part A); Days 1, 6, 8, 9, 15, and 16 (Part B)
Heart rate (HR) measured by 12-lead ECG (PArt A + Part B)
Absolute heart rates at the different days of measurement
Time frame: Days 1 and 6 (Part A); Days 1, 6, 8, 9, 15, and 16 (Part B)
Hourly mean heart rate (HR) measured by 24-hour Holter ECG
Absolute and change from baseline in hourly mean HR on each day of measurement
Time frame: Days 1 and 6 (Part A); Days 1, 6, 8, 9, 15, and 16 (Part B
Areas under the plasma concentration-time curves (AUC) for ACT-334441, diltiazem and atenolol (Part B)
AUCs will be calculated will be calculated according to the linear trapezoidal rule for the following periods: from zero to time t of the last measured concentration above the limit of quantification, from zero to 24h after study drug administration, from zero to infinity)
Time frame: Blood samples from Day 1 to Day 20 for the PK profile of diltiazem and atenolol, and from Day 8 to Day 21 for the PK profile of ACT-334441.
Maximum plasma concentration (Cmax) for ACT-334441, diltiazem and atenolol (Part B)
The measured individual concentrations of ACT-334441, diltiazem and atenolol will be used to obtain their respective Cmax
Time frame: From Day 1 to Day 20 for diltiazem and atenolol; from Day 8 to Day 21 for ACT-33444.
Time to reach the maximum plasma concentration (tmax) for ACT-334441, diltiazem and atenolol (Part B)
The measured individual concentrations of ACT-334441, diltiazem and atenolol will be used to obtain their respective tmax
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
film-coated tablet containing atenolol at a strength of 50 mg
film-coated tablet containing diltiazem at a strength of of 120 mg
Time frame: From Day 1 to Day 20 for diltiazem and atenolol; from Day 8 to Day 21 for ACT-33444
Terminal half-life [t(1/2)] of ACT-334441, diltiazem and atenolol (Part B)
Time required for the plasma concentration of a drug to decrease by 50% in the final stage of its elimination
Time frame: From Day 1 to Day 20 for diltiazem and atenolol; from Day 8 to Day 21 for ACT-33444
Trough plasma levels (Ctrough) of of ACT-334441, diltiazem and atenolol (Part B)
Ctrough will be used to determine the attainment of steady state conditions
Time frame: From Day 1 to Day 15 for diltiazem and atenolol; from Day 8 to Day 15 for ACT-33444
Number of subjects with adverse events as a measure of safety
An AE is defined as any unfavorable and unintended sign, including an abnormal laboratory finding, symptom or disease, that occurs during the course of the study, whether or not considered related to the study drug
Time frame: From baseline to end of study [Day 20-23 (Part A), Day 556-59 (Part B)]