Update I've found the Triple PowerZen formula has changed. Some stores still have the old formula, though usually for $15 instead of $10. Recent winners have been StarSX, Rhino5, and O.M.G. Rhino5 was recalled by the manufacturer after the FDA found desmethylcarbondenafil and dapoxetine. The former is a PDE5 inhibitor like cialis/viagra, etc. The latter is an SSRI that's combined with viagra or cialis and prescribed in some other parts of the world. SSRIs tend to inhibit arousal and orgasm.