Phenacal Tablet is a western medicine of antipyretic and analgesic type. Adults take 1 tablet once, orally, if the symptoms are not relieved, you can use the medicine again at an interval of 4 to 6 hours. The main ingredients are acetaminophen and caffeine. It is clinically used for the treatment of fever caused by common cold or influenza, and can also be used to relieve mild to moderate pain such as headache, migraine, toothache and menstrual cramps. It needs to be taken with water, adults take 1 tablet once, if the symptoms are not relieved, it can be used again at an interval of 4 to 6 hours, not more than 4 times in 24 hours. It is forbidden to use it for patients with severe liver or kidney insufficiency and drug allergy; special groups such as pregnant women, lactating women and elderly patients should use it under doctor’s guidance. Long-term use of large quantities of the drug will be abnormal liver and kidney function, can not be taken together with drugs containing acetaminophen and other antipyretic and analgesic at the same time. Patients who are taking other medicines should explain to the doctor in time. Drugs need to be used under the guidance of a doctor, do not abuse on their own to avoid adverse consequences.