The cost of adaptive equipment for a medical condition is a deductible expense. However, you must itemize and your total medical costs must exceed your applicable threshold (10% of adjusted gross income, or 7.5% of adjusted gross income if you or your spouse is at least 65 years old by the end of the year).
Interest on debt used to carry investments, but not including interest expense from a passive activity. Deductions are limited to net investment income.