Although the level of tamoxifen induced damage displayed a degree of interindividual variability, when present, it was 10 to 100 times higher than that reported for other suspect human colon carcinogens such as 2 amino 1 methyl 6 phenyimidazo 4, 5 b pyridine priligy tablets 190 192 Clinical trials with O 6 benzylguanine O6 BG are now in progress