Delay spray is generally recommended half an hour before intercourse can be used. Half an hour before intercourse, it is recommended that patients spray the delay spray on the glans and the coronary groove of these parts, need to spray 1-2 times, and then use a clean hand to smear wipe, in order to promote the skin to absorb the delay spray, help to improve the therapeutic effect of the drug, half an hour later, when the delay spray to play the efficacy of the later, you can begin to cohabitate. Delay spray must be used correctly, can not spray too much, to avoid causing discomfort, delay spray adverse reactions include allergic reactions, such as rashes, itching and burning sensation, as well as red symptoms, but also cause excessive numbness and other symptoms, need to pay attention to if the glans skin broken, can not spray delay spray. In addition, the use of time-lapse sprays, there is a certain risk, the patient needs to get the guidance of a specialist, do not be negligent or blindly use on their own, so as not to affect the health.