It does not matter if a person with HIV/AIDS forgets to take his/her medication once in a while, but it is necessary to avoid missing medication frequently, in order to prevent the effects of medication from being affected and to increase the risk of drug resistance. For AIDS patients or HIV carriers, it is necessary to adhere to the correct principles of taking medication in the course of treatment, and to take medication early, in sufficient quantity, throughout the course of treatment, in combination, and on a regular basis, in order to achieve optimal efficacy of the medication, and to avoid the emergence of drug resistance. It does not matter if HIV patients or HIV carriers forget to take their medication every once in a while, they can just pay attention to taking their medication on time in the future. However, if they forget to take their medication regularly, it will affect the effectiveness of the medication and increase the risk of drug resistance. Patients are advised to take their medication regularly to avoid missing doses, and to take drug resistance tests regularly while taking antiretroviral drugs to avoid failure of antiretroviral therapy.