In general, taking vajra tablets will take effect in about two weeks, but the specific time can not be determined, mainly related to the severity of each person’s condition, the more serious the condition, the longer the effect time will be. King Kong Tablet is a relatively common clinical a kind of Chinese patent medicine, the drug composition has Ba Ji Tian, Cortex Eucommiae, dog spine, sheep fire leaf, etc., has the role of warm tonic kidney Yang, commonly used in the treatment of lumbar and knee soreness and weakness, impotence, spermatorrhea, urination, premature ejaculation, frigidity of sexual life. Suggested that patients take in accordance with the instructions or under the guidance of a doctor, usually take two weeks to take effect, during the medication need to pay attention to do not miss service, do not stop taking medication, and need to avoid eating ice cream and other excessively cold food, and try to do as little as possible to do sexual intercourse. Although the effect of vajra tablets is better, but for children under 14 years of age should not eat vajra tablets, because of its drug tonicity, may affect the growth and development of children.