Doxycycline tablets should be taken after meals as much as possible. Doxycycline tablets are commonly used in the clinic for infections caused by sensitive gram-positive and negative bacteria, typhus, etc. They should not be eaten with meals or on an empty stomach, eating will affect the absorption of doxycycline tablets, and taking the drug on an empty stomach may cause gastrointestinal irritation, and also damage the liver and kidneys, which is unsuitable for patients with gastrointestinal tract diseases. Doxycycline tablets after meals, can reduce the drug on the gastric mucosa stimulation caused by nausea, vomiting, abdominal pain, diarrhea and other gastrointestinal discomforts, in order to reduce gastrointestinal stimulation, after taking the drug should be appropriate exercise and drink a lot of water, to promote the absorption and metabolism of the drug for the existence of digestive disorders of the patients to take after meals is more suitable for some. Doxycycline tablets belong to tetracycline antibiotics, antacids containing calcium or magnesium, milk or multivitamins will significantly reduce the absorption of doxycycline, allergic to tetracyclines, pregnant women and children under the age of 8 years old is prohibited, breastfeeding women should be suspended breastfeeding during the period of use, the use of drugs during the occurrence of uncomfortable symptoms, should be immediately consult a doctor and use the drugs under the guidance of a physician.