Adherence to preventative HIV infection therapies

Several studies have shown that actions to prevent HIV infection prior to exposure reduce HIV infection in men who have sex with men and transgender women by 44%. These preventative actions include tenofovir disoproxil fumarate and emtricitabine oral drug therapies. This study assessed adherence to these therapies, sexual behaviors, and STI and HIV infection in men who have sex with men and transgender women in STI clinics in San Francisco, Miami, and Washington, D.C. They tested the blood concentration of the drugs, number of sex partners, instances of unsafe sex, and HIV infection. At follow-up visits, 80% of participants had levels of the drug that would be sufficient to protect them from infection. African American populations and those in Miami were less likely to have sufficient blood concentration. Populations with stable housing and those who had more than two unsafe sex partners within the last three months were more likely to have sufficient blood concentration. The study concluded that the more a participant acts on risky behaviors, the more likely they are to be adherent to the preventative therapies.

I was pleasantly surprised by the results of the study. I was expecting the people who have risky behaviors to be less inclined to prevent infection simply because they were participating in the risky behaviors. It bodes well in regards to the HIV epidemic that these people are working to prevent infection, though in a perfect world, all people participating in these behaviors would be adherent to preventative therapies.


JAMA Intern Med. 2016;176(1):75-84.

2 thoughts on “Adherence to preventative HIV infection therapies”

  1. I think that this article is very interesting because I was unaware that people could take preventative medications to reduce the chances of contracting HIV. It is very reassuring to find out that people who are at risk are taking measures to keep them safe. I think that these therapies should be better advertised so that others can also benefit from this therapy. I think it is the job of the healthcare providers, pharmacists included, to be able to recommend different treatment options to specific patient populations. It is also important to have the treatment options available in geographic areas where the prevalence of the disease is the highest.

  2. I think this article is great and encouraging news in the treatment and prevention of HIV. This life altering disease has an impact on many lives. I’m not surprised that people who engaged in more risky behavior where more likely to adhere to the medication, since they are more likely to contract the disease. Showing that they are well educated on HIV and how it is spread. I would be interested to investigate the populations who were not as adherent. Looking into possible factors that influence how and when they take the medications and possible solutions to the barriers they face.

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