Synergistic enhancer (antiretroviral)
（重定向自Hiv enhancer）
Synergistic enhancers of antiretrovirals usually do not possess any antiretroviral properties alone, but when they are taken concurrently with antiretroviral drugs they enhance the effect of that drug.
One of these is an over-the-counter nutritional supplement and another two of these have been FDA approved (for other indications). The effects of these drugs, however, will require further evaluation before being clinically exploited.