The three times a day medication is usually taken 8 hours apart, and the specific medication needs to be taken strictly in accordance with the instructions or medical advice. Usually, most of the drug instructions indicate how many times a day to take, and most patients often mistake three times a day as morning, noon and afternoon, or before and after three meals. However, the normal three times a day is based on the changes in the concentration of the drug in the blood during the 24 hours of the day. Therefore, the correct time to take the medication is every 8 hours. If the interval between doses is too short, it may increase the side effects of the drug; if the interval between doses is too long, it will reduce the effectiveness of the drug and will not play a good therapeutic role. Considering the normal work and rest time, three doses a day can be scheduled at 7:00 am, 3:00 pm and 10:00 pm. If there are special circumstances, it can fluctuate slightly before and after, but should not change too much.