The efficacy of Dapoxetine Hydrochloride can last for about twenty hours. Dapoxetine hydrochloride has the effect of increasing the ejaculation threshold as well as delaying ejaculation, prolonging the duration of sexual life, and is mainly used in the treatment of male premature ejaculation in clinical practice. After taking the drug about half an hour after the start of the effect, 1 ~ 2 hours blood concentration reached the peak, the effect of the drug can be maintained for nearly twenty hours. Generally choose to take it within one to three hours before sex, when the effect is not good, you should consult a doctor in time, can not arbitrarily increase the dose of the drug. Nausea, dizziness, headache, diarrhea, insomnia and fatigue may occur during the use of the drug, and may disappear shortly after stopping the drug. Use with caution in people with severe heart disease. Dapoxetine Hydrochloride should always be used under medical supervision.