You must remember, the deduction is limited to the expenses that exceed 7.5% of your adjusted gross income.
For example, if you are 48 years old with an AGI of $50,000 and you incurred $4,750 in medical and dental expenses last year, you could deduct $1,000 (the amount in excess of 7.5% of your AGI, or $3,750), assuming you're itemizing.