The best replacement for inh is isoniazid.

The best alternatives to inh are rated as following:
★★★★★  isoniazid
★★★★  rifampin

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Speaking about inh, one probably shouldn't forget about b6.

Other search terms related to inh and their ratings are:
★★★★★ b6
★★ pyridoxine
★ vitamin b6
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inh
isoniazid
rifampin