トラピジル

Pharmaceuticals

Pharmaceuticals -> Listed in ZINC15

Pharmaceutical

Warning

H315 (97.4%): Causes skin irritation [Warning Skin corrosion/irritation]

P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 39 reports by companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Drug-Induced Liver Injury Severity and Toxicity (DILIst)

Trapidil

DILI Positive

DOI:10.1016/j.drudis.2019.09.022

C - Cardiovascular system

QC - Cardiovascular system

Trapidil is thought to inhibit cyclic adenosine monophosphate (cAMP) phosphodiesterase enzymes. The resultant increase in cAMP potentiates the inhibition of platelets by adenosine. The reduction in platelet activation is likely responsible for the decrease in thromboxane A2 generation seen with trapidil. The increase in cAMP is also likely responsible for the vasdilatory action of trapidil. The increase in protein kinase A activity due to increased cAMP activated L-type calcium channels in the heart leading to increased depolarization and a positive inotropic effect. Lastly, PKA inactivates Raf-1, an activator of mitogen activated protein kinase (MAPK), which leads to a reduction in MAPK activation. This reduction in MAPK prevents mitogenesis due to PDGF binding to PDGF receptors.

Compounds which inhibit or antagonize the biosynthesis or actions of phosphodiesterases.

Drugs or agents which antagonize or impair any mechanism leading to blood platelet aggregation, whether during the phases of activation and shape change or following the dense-granule release reaction and stimulation of the prostaglandin-thromboxane system.

Drugs used to cause dilation of the blood vessels.

Trapidil has a Tmax of 1 h.

The apparent clearance is 179 mL/min for a single dose and 273 mL/min for steady state dosing.