Nneka Nwokolo is a Consultant Physician at 56 Dean Street in London. Most people who use PrEP are buying generic PrEP online. There have been concerns about whether these drugs are genuine or not. Nneka has been at the forefront of drug level testing in people who take generic PrEP. She has organised tests on hundreds of samples of PrEP – and has found no evidence of any fake preparations on the market.