VHB Life Sciences Limited manufactures 6-Thioguanine. VHB Life Sciences Limited has WHO GMP certified facility as well as INVIMA approved facility. 6-Thioguanine is available in ten blisters of ten tablets. This product is used in cases of acute myelogenous leukemia, acute lymphoblastic leukemia and chronic myelogenous leukemia. 6-Thioguanine bears the brand name 6-TG.