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A persistent challenge in HIV/AIDS treatment and prevention is medication adherence – getting patients to take their medication as required to get the best results.

Currently, a once-daily pill to prevent HIV infection is available. However, adherence to a once-daily regimen can be difficult for some people. Researchers from the UNC School of Medicine and the Centers for Disease Control and Prevention published a study today in Nature Communications that reports a potentially promising remedy for this problem. The researchers developed an ultra long-acting, injectable, and removable formulation of an antiretroviral medication called dolutegravir, and they tested the formulation’s effectiveness in animal models.

The injectable formulation includes the anti-HIV drug, a polymer, and a solvent. The three-component liquid solidifies into an implant once injected under the skin. As the polymer slowly degrades, the drug is released.

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