What legally "is and isn't" tax deductible can often be confusing, especially when dealing with medical expenses for items that can be bought either over-the-counter or nonprescription. What is the proper tax treatment of items such as: over-the-counter drugs, dietary supplements, herbal remedies, nicotine patches, contact lens solution, bandages, toothpaste and other medical supplies? About's Arthritis Guide, Carol Eustice, answers these questions.