PERTH, Australia – Starpharma Holdings Ltd. is pausing sales of its antiviral nasal spray, Viraleze (SPL-7013), in the U.K. after its retail partner, Lloydspharmacy, received a letter from the U.K.’s Medicines and Healthcare products Regulatory Agency (MHRA) related to promotional claims made about the antiviral with respect to SARS-CoV-2 and COVID-19.