A method for treating or ameliorating mucocutaneous, ocular toxicities, or side effects induced by blocking cellular growth and survival signal transduction pathways. The method comprises administering to a subject in need thereof an effective amount of a histone deacetylase inhibitor and a pharmaceutically acceptable carrier, salt or solvate thereof, wherein the cell growth and survival signal transduction pathways are blocked by an antibody targeted therapy agent, antibody fragment, targeted small-molecule chemical compound, low-molecular-weight tyrosine kinase inhibitor, peptide mimetic, anti-sense oligonucleotide (DNA and/or RNA), or ribozyme.
