HPF Hangover Prevention Formula (HPF)  provides protection from the "morning after symptoms experienced after prolonged or excessive alcohol consumption. HPF contains Tex-OE, a patented all-natural extract formula derived from the fruit of the prickly pear cactus (Opuntia ficus opuntia) and B vitamins. Tex-OE provides hangover symptom protection by accelerating the body's natural response to physical stressors such as alcohol. Because alcohol can deplete vitamins necessary for proper nerve, muscle and cardiovascular function, HPF contains supplemental B vitamins, as well.