Black Ant King is the substitute for American Viagra successfully developed by Hong Kong Hongwei Biological Research Center in 2009 after years of clinical trials and the best challenger of Cialis. Black Ant King can quickly elongate, thicken and enlarge the penis to effectively rescue you from short intercourse sexual time, take good therapeutic effect on preventing imprtence and premature ejaculation, prolonging the time of sexual intercourse, treating indurable erection. It stays in human body as long as 180 hours without causing side effect of dependence. Black Ant King is of good therapy eutic effect on prostate disease. Alcohol does not interfere with its therapeutic effect.