The velocity profile reduces when we strengthen the radially varying magnetic field. Silver and copper nanoparticles show opposite behavior on the number of the trapped bolus. With an increase in the amplitude ratio υ the pressure rise enhances in the retrograde pumping region. Pressure rise enhances due to the impulsion of metallic nanoparticles when compared to that of the pure blood. The trapping bolus phenomenon shows that the number of the bolus decreases with increasing Hartmann number.