The purpose of this phase 2 study is to evaluate the efficacy and safety of an analgesic drug candidate, VVZ-149 Injections. The study is designed as randomized, double-blind, parallel, and placebo-controlled study.
VVZ-149 is a dual antagonist of GlyT2 and 5HT2A. GlyT2 blockage increases inhibitory synaptic transmission by glycine in the spinal cord, resulting in a reduction of pain transmissions to the brain. 5HT2A blockage decreases descending serotonergic facilitatory modulation on pain transmission by the brain and reduces nociceptor activation in peripheral nerves, which are primary sources of pain in post-surgical pain. VVZ-149 has been shown to have comparable efficacy to morphine in well controlled (blind, complete randomization with a positive control) animal studies using rat models of post-operative pain and formalin-induced pain. The PK/PD study in animals indicates that therapeutic plasma concentration in human subjects will be 600-1,900 ng/ml. A clinical Phase 1 study performed in healthy subjects has shown no clinically significant adverse events up to a plasma concentration level of 3,261 ng/ml other than brief symptoms of mild nausea or dizziness, and mild somnolence when the plasma exposure level is more than 2,000 ng/ml.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
12
•VVZ-149 injection
water for injection
Yonsei University Health System, Severance Hospital
Seoul, South Korea
Change of Pain Intensity
Change of Pain Intensity assessed using the Numerical Rating Scale (NRS, 0-10)
Time frame: prior to PCA, at 0,1, 2, 4, 6, 8, 10, 24 hours post-PCA
Fentanyl Consumption
the amount of fentanyl consumption over 24 hours
Time frame: 0-2, 2-4, 4-6, 6-8, 8-10, 10-12, 12-14, 14-16, 16-18, 18-20, 20-22, 22-24 hours post-PCA
the number of Fentanyl request
the number of PCA request over 24 hours
Time frame: 0-2, 2-4, 4-6, 6-8, 8-10, 10-12, 12-14, 14-16, 16-18, 18-20, 20-22, 22-24 hours post-PCA
the amount of rescue dose
the amount of rescue dose over 24 hours
Time frame: 0-2, 2-4, 4-6, 6-8, 8-10, 10-12, 12-14, 14-16, 16-18, 18-20, 20-22, 22-24 hours post-dose
the number of requested rescue dose
the amount of requested rescue dose over 24 hours
Time frame: 0-2, 2-4, 4-6, 6-8, 8-10, 10-12, 12-14, 14-16, 16-18, 18-20, 20-22, 22-24 hours post-dose
Area under a curve (AUC) of Pain intensity and sum of AUC of pain intensity (SPI)
the calculated AUC of Pain intensity and sum of AUC of pain intensity (SPI)
Time frame: 0-1, 1-2, 2-4, 4-6, 6-8, 8-10, 10-24 hours post-PCA
Global measurement of patient satisfaction assessed on the questionnaire (0-5 points scale)
the assessment of global satisfaction of patients using 0-5 points scale
Time frame: 8, 24 hours post-PCA
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the correlation between Pharmacokinetic (PK) and Pharmacodynamic (PD)
Correlation between total opioid consumption (fentanyl dose equivalents) and plasma exposure of study drug at 0, 2, 6 hours post-PCA
Time frame: 0, 2, 6 hours post-PCA
Number of Vomiting
the number of vomiting after PCA
Time frame: 8, 24 hours post-PCA