Expenses that can be deducted from business income

As I understand, deduction for mediclaim insurance premium for assessee, spouse, dependant children & parents is available as per sec 80D. With reference to medical expenses, deduction u/s 80DDB can be claimed if certain conditions are satisfied. Medical expenses for self & family are in the nature of personal expenses, so it might not be allowed as deduction. However, views of others are welcome.