Ramatroban (INN) (also known as BAY u3405)[1] is a thromboxane receptor antagonist.

[5] It has been suggested that ramatroban, by modulating DP2 receptor, can reverse viremia-associated proinflammatory and prothrombotic processes which are similar to those induced by SARS-Cov-2.

[citation needed] Hence, ramatroban, that has been used for the treatment of allergic rhinitis in Japan for the past two decades with a well established safety profile, merits investigation as a novel immunotherapy for the treatment of COVID-19 disease, although no clinical trial has yet been conducted.

[6] Ramatroban was developed by the German pharmaceutical company Bayer AG and is co-marketed in Japan by Bayer Yakuhin then marketed by Kyorin Pharmaceutical and Nippon Shinyaku Co., Ltd. under the trade name Baynas.

This drug article relating to the respiratory system is a stub.