In general, after taking cold medicine, you can get pregnant again the next month, so that all the drugs in your body are basically metabolized and will not cause adverse effects on the embryo. For example, white plus black is available all during pregnancy, so there will be no effect. Some people take cold medicine is not safer cold medicine, there is a teratogenic effect on the child, how long after eating can you have a child, you need to calculate from the perspective of the half-life of drug metabolism. The half-life of the drug is 24-48 hours, rarely more than 72 hours, so after taking cold medicine, after 3 days should be able to have children. But now we are all eugenic, many people are too nervous, in order to make you feel more at ease, it is recommended that you take cold medicine this month, you can extend the time to have a child to the next month, that is, after a menstrual period and then have a child, this is the safest and most reliable. While taking cold medicine you should pay attention to the diet as light as possible, avoid spicy, greasy, irritating food, do not drink strong tea, strong coffee, wine, etc.