phosphodiesterase inhibitor

Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:

Quality Level

biological source

synthetic (organic)


≥98% (HPLC)




1.1 μM IC50 (for PDE IV)
2.5 μM IC50 (for PDE III)

SMILES string




InChI key



Zardaverine has been used as a phosphodiesterase inhibitor:
  • to study its effects on human colonic epithelial cells
  • to study its effects on junctional proteins in Sertoli cells
  • to study its effects on phosphodiesterase 3 A (PDE3A) expression in various tumor cells

Biochem/physiol Actions

Zardaverine is a derivative of pyridazinone. It shows anti-tumor and anti-proliferative activity in varied cell lines. Zardaverine possesses broncho-dilatory activity and exhibits therapeutic effects against asthma.
Selective inhibitor of phosphodiesterase III/IV (PDE3/4).

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

W Fischer et al.
Biochemical pharmacology, 45(12), 2399-2404 (1993-06-22)
Phosphodiesterase inhibitors were used as a tool to manipulate cellular nucleotide levels in vitro and in vivo. The lipopolysaccharide (LPS)-induced release of tumor necrosis factor alpha (TNF-alpha) from mouse peritoneal macrophages was inhibited by prostaglandin E2 with an IC50 of...
K F Rabe et al.
The American journal of physiology, 264(5 Pt 1), L458-L464 (1993-05-01)
The effects of the nonselective phosphodiesterase (PDE)-inhibitor 3-isobutyl-1-methylxanthine (IBMX) and the selective PDE inhibitors SKF 94120 (type III), rolipram (type IV), zardaverine (type III/IV), and zaprinast (type V) on inherent tone in human airways were investigated. Substantial relaxation was achieved...
Bronchodilator and positive inotropic activity of pyridazine compound Zardaverine as a phosphodiesterase isozymes inhibitor
Asif M
Journal of Chemical and Pharmaceutical Sciences , 3(1), 31-34 null
G Dent et al.
The Journal of pharmacology and experimental therapeutics, 271(3), 1167-1174 (1994-12-01)
The cyclic AMP phosphodiesterase (PDE) III/IV inhibitor, zardaverine, and the PDE IV-selective inhibitor, rolipram, both caused concentration-dependent inhibition of opsonized zymosan-stimulated superoxide anion generation by purified human peripheral blood eosinophils with approximate IC50 values of 30 and 40 microM, respectively....
T Brunnée et al.
The European respiratory journal, 5(8), 982-985 (1992-09-01)
Zardaverine is a newly developed selective phosphodiesterase III and IV inhibitor. This study investigates the bronchodilatory properties of zardaverine, administered by inhalation. Twelve patients with reversible bronchial obstruction (increase in forced expiratory volume in one second (change FEV1 % predicted)...

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