The present disclosure provides compounds that include hydroxylamines of formula (I) or (II), pharmaceutical compositions, and methods for their use. The methods utilize hydroxylamine compounds and/or their pharmaceutical compositions for the treatment of angiogenesis, hepatitis, complement-mediated pathologies, drusen-mediated pathologies, macular degeneration and certain other ophthalmic conditions, inflammation, arthritis, and related diseases and for the inhibition of complement activation.