be careful with that shit bro. I think you will be ok stacking them but that is a heavy stack. I do believe the toxicity of orals is overrated, but I know that those two bould be hard on the liver. I do think that those who use halo though commonly do stack it w/ winstrol though. Most who use halo in my opinion are mainly interested in results, not health. But I do not like to stereotype... Just make sure you take all the necessary precautions and drink over a gallon of water ED in addittion to your normal daily water intake.