INH (Isoniazid) Safety: Some references
INH is used by some Cpn doctors, especially due to it's efficacy in the Mitchell/Stratton studies. Because of a potential for liver toxicity, and early reputation that it is significantly so, it's safety among most doctors is considered low. However, more current studies using large cohorts in public health for treating TB have shown different results. I've excerpted the conclusions and given links for a couple studies below.The following study of over 11,000 people looks at long term safety of INH for treatment of TB, which requires long-term use.