A drug taken three times a day cannot be divided into two. Drugs eat three times a day is based on the blood concentration and drug half-life of the formulation, if the day to eat three times the drug is divided into two times to eat, may lead to a period of time of blood concentration does not reach the therapeutic concentration, will affect the effect of the drug, and divided into two times to eat, each time belongs to the overdose of the drug, but also may make the drug side effects aggravated. If it is a more specific drug, may cause adverse consequences, so the day to eat three times the drug can not be divided into two times to eat. The five principles of safe drug use are the right time, the right dose, the right drug, the right route of administration and the right patient, the medication should be taken in strict accordance with the doctor’s instructions, do not adjust the time and dose, and so on. If you have already taken the medicine that you take three times a day in two parts, you should go to the hospital in time to avoid adverse consequences.