I do not know about meth, you can always google "Meth and HCV" or Meth and liver disease. I am not interested enough in the subject to look it up for you.
Marijuana used in a vaporizer or as an edible, *might* be okay, but as long as you have the virus attacking your liver, you really ought to consider treating for HCV.
I am a strong proponent of medical marijuana to get through treatment. It is likely easier on your liver than OTC pain relievers and for me helped with anxiety and insomnia.
Alcohol is specifically horrible, for Hep C, and so is Tylenol and even too much Ibuprofen. Most drugs are processed through the liver.
There are actually at least 50 home-made "recipes" for meth, and shooting it is dangerous, it could be anything.
I think if I were you, I would quit the meth first, and you could use marajuana as a substitute,if it helps your depression :)
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