High Voltage Double Flush Liquid and Capsules Combos* are specially formulated with a unique blend of B-Vitamins Creatine and numerous nutrients and herbal extracts to remove unwanted toxins and pollutants from your urinary tract. High Voltage Fast Flush Capsules and Liquid take effect within 2 hours and can last up to 12 hours depending on ones metabolism and the amount of Toxins in their systems.