Overview A Pilot Study of Sildenafil in COVID-19 Status: Recruiting Trial end date: 2020-11-09 Target enrollment: Participant gender: Summary Observe the efficacy and safety of G1(Sildenafil citrate tablets) in patients with COVID-19 under clinical actual diagnosis and treatment conditions Phase: Phase 3 Details Lead Sponsor: Tongji HospitalTreatments: Citric AcidSildenafil CitrateSodium Citrate