Ginger tea or peppermint tea or ginger chews might help with nausea. Could also ask your doctor if a two-drug regimen, azithromycin plus ethambutol, is an option. There's an ongoing clinical trial looking two drugs versus three, and some studies in other countries have shown positive results for the two-drug plan, at least for non-cavitary MAC. For cavitary MAC they usually want to be more aggressive. Good luck.