Consumption of Lianhua Qingdian capsule usually does not directly cause delayed menstruation, but due to Lianhua Qingdian capsule this product is on the cold side, may make the body cold women caused by delayed menstruation. The main drugs in Lianhua Qingdian capsule include forsythia, rhubarb, Panax quinquefolium, fritillaria, gypsum, honeysuckle and other medicines. The specific effects are clearing the lungs and draining heat (clearing heat and evil in the lungs), and clearing distemper and detoxification (clearing distemper, heat and toxicity). It can be used for treating influenza, which is a heat and poison attacking the lungs syndrome, with fever, malignant cold (fear of cold), muscle aches and pains, nasal congestion and runny nose, cough, headache, dry throat and sore throat, and reddish tongue with yellowish or greasy tongue coating. When taking Lianhua Qingwen Capsule, a few people may have adverse reactions such as skin rash, diarrhea, nausea, etc. It is forbidden for those who are allergic to this drug. As this product is on the cold side, it is not recommended to take this medicine for a long period of time. Women who have a cold constitution may experience a short-term effect on their menstrual cycle, which will return to normal after discontinuing the medication. The use of drugs need to be under the guidance of a physician, if you do not feel well, it is recommended to go to the hospital in time.