Fig. 3From: Drug repurposing: re-inventing therapies for cancer without re-entering the development pipeline—a reviewPictorial representation of diverge mechanisms of action of ritonavir in different cancers. Ritonavir is thought to apply its anti-cancer action by hindering numerous signaling pathways, including the AKT and nuclear factor-kappa B pathways; it also inhibits survivin, HSP90 substrates and induces ER stress and apoptosis by blocking Akt pathways in various cancersBack to article page