Taking cold medicine lip swelling is considered and drug allergy, lipitis and other reasons related. 1. drug allergy: taking cold medication after the lip swelling is considered to be taking some of the drugs caused by allergies, often accompanied by skin itching, rashes and other symptoms. If it is a drug allergy caused by swollen lips, it is recommended to stop the drug immediately. If the allergy symptoms are more serious, it is recommended to take anti-allergy drugs, such as commonly used cyproheptadine tablets, loratadine tablets and so on. 2. Lipitis: If you suffer from lipitis can also cause lip swelling, often accompanied by dry lips, flaking, swelling and pain and other symptoms, this situation is generally not related to taking cold medicine. Lipitis caused by swollen lips can be applied through the local skin medication, such as erythromycin ointment, tretinoin ointment and so on. Taking cold medicine lip swelling may also be other reasons, you need to go to the hospital in time to check the specific cause and treatment, so as not to delay the condition. The above drugs need to be used under the guidance of a physician.