Pharmaceutical Drug Company Lead Researcher Type Status Aciclovir patents expired Schaeffer & B. Elion nucleic acid analogue In Production Valaciclovir patents expired ? nucleic acid analogue In Production Famciclovir patents expired ? nucleic acid analogue In Production Pritelivir AICuris ? helicase-primase inhibitor Phase II[105] Amenamevir Astellas Pharma Inc Kiyomitsu Katsumata[106] helicase-primase inhibitor In Production BX795 ? Deepak Shukla kinase inhibitor Preclinical SADBE Squarex, LLC[107] Hugh McTavish, PhD, JD Topical solution; immunological adjuvant Phase II[108]