A REFILLABLE IMPLANT DELIVERS STEADY STREAM OF HIV PROPHYLACTICS February 29, 2016 By Rob Goodier NEW YORK (Reuters Health) – A refillable implant could someday passively administer pre-exposure prophylaxis drugs to HIV patients. Now in animal trials, the device has successfully released a stream of tenofovir diphosphate and emtricitabine triphosphate without the need for pumps, valves or a power supply, according to research presented February 21 at the American Society of Mechanical Engineers’ NanoEngineering for Medicine and Biology Conference in Houston, Texas. “The constant drug release is achieved through the use of nanochannels, which are engineered in size to be slightly larger (but still comparable) to the size of drug …