Cilostazol

Cilostazol
Clinical data
Pronunciation/sɪˈlɒstəzɒl/
sil-OS-tə-zol
Trade namesPletal
AHFS/Drugs.comMonograph
MedlinePlusa601038
License data
Routes of
administration
By mouth (tablets)
ATC code
Legal status
Legal status
  • AU: S4 (Prescription only)
  • UK: POM (Prescription only)
  • US: ℞-only
Pharmacokinetic data
Protein binding95–98%
MetabolismLiver (CYP3A4- and CYP2C19-mediated)
Elimination half-life11–13 hours
ExcretionKidney
Identifiers
  • 6-[4-(1-Cyclohexyl-1H-tetrazol-5-yl)butoxy]-
    3,4-dihydro-2(1H)-quinolinone
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.215.897
Chemical and physical data
FormulaC20H27N5O2
Molar mass369.469 g·mol−1
3D model (JSmol)
  • O=C4Nc3c(cc(OCCCCc1nnnn1C2CCCCC2)cc3)CC4
  • InChI=1S/C20H27N5O2/c26-20-12-9-15-14-17(10-11-18(15)21-20)27-13-5-4-8-19-22-23-24-25(19)16-6-2-1-3-7-16/h10-11,14,16H,1-9,12-13H2,(H,21,26) Y
  • Key:RRGUKTPIGVIEKM-UHFFFAOYSA-N Y
  (verify)

Cilostazol, sold under the brand name Pletal among others, is a medication used to help the symptoms of intermittent claudication in peripheral vascular disease. If no improvement is seen after 3 months, stopping the medication is reasonable. It may also be used to prevent stroke. It is taken by mouth.

Common side effects include headache, diarrhea, dizziness, and cough. Serious side effects may include decreased survival in those with heart failure, low platelets, and low white blood cells. Cilostazol is a phosphodiesterase 3 inhibitor which works by inhibiting platelet aggregation and dilating arteries.

Cilostazol was approved for medical use in the United States in 1999. It is available as a generic medication. In 2019, it was the 347th most commonly prescribed medication in the United States, with more than 800 thousand prescriptions.