CIRCULAID 400 is the trademark of Pentoxifylline, a blood viscosity-reducing agent.

Each CIRCULAID 400 controlled-release Tablet contains Pentoxifylline 400mg.

CHEMISTRY

Pentoxifylline is: 3,7-dimethyl-1-(5-oxohexyl)-3,7-dihydro-1H-purine-2,6-dione.