The best time to drink tonic wine is at noon or 2 hours before intercourse. Specifically, during the daytime, yang energy is relatively abundant, which is suitable for tonic, and at night, tonic yang energy means increasing the fire in the body, resulting in dryness and heat, which will have a certain impact on falling asleep. If you want to have sexual intercourse, drink kidney tonic wine 2 hours before, so that the body for some nutrients in the wine to be absorbed, through the diffusion of alcohol, you can achieve a good effect, and then have sexual intercourse, will not be unable to do so. For the kidney tonic wine, it has a certain age limit, generally men over 40 years old, and do not have sex too often, otherwise it will damage the kidney essence.